Co-authored-by: Callum Waters <cmwaters19@gmail.com>
Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

## Description

fix golang 1.15 errors. 

Closes: #XXX

## Description

partially cleanup in preparation for errcheck

i ignored a bunch of defer errors in tests but with the update to go 1.14 we can use `t.Cleanup(func() { if err := <>; err != nil {..}}` to cover those errors, I will do this in pr number two of enabling errcheck.

ref #5059

* Fix many golint errors

* Fix golint errors in the 'lite' package

* Don't export Pool.store

* Fix typo

* Revert unwanted changes

* Fix errors in counter package

* Fix linter errors in kvstore package

* Fix linter error in example package

* Fix error in tests package

* Fix linter errors in v2 package

* Fix linter errors in consensus package

* Fix linter errors in evidence package

* Fix linter error in fail package

* Fix linter errors in query package

* Fix linter errors in core package

* Fix linter errors in node package

* Fix linter errors in mempool package

* Fix linter error in conn package

* Fix linter errors in pex package

* Rename PEXReactor export to Reactor

* Fix linter errors in trust package

* Fix linter errors in upnp package

* Fix linter errors in p2p package

* Fix linter errors in proxy package

* Fix linter errors in mock_test package

* Fix linter error in client_test package

* Fix linter errors in coretypes package

* Fix linter errors in coregrpc package

* Fix linter errors in rpcserver package

* Fix linter errors in rpctypes package

* Fix linter errors in rpctest package

* Fix linter error in json2wal script

* Fix linter error in wal2json script

* Fix linter errors in kv package

* Fix linter error in state package

* Fix linter error in grpc_client

* Fix linter errors in types package

* Fix linter error in version package

* Fix remaining errors

* Address review comments

* Fix broken tests

* Reconcile package coregrpc

* Fix golangci bot error

* Fix new golint errors

* Fix broken reference

* Enable golint linter

* minor changes to bring golint into line

* fix failing test

* fix pex reactor naming

* address PR comments

Refs #3262

* Fix long line errors in abci, crypto, and libs packages

* Fix long lines in p2p and rpc packages

* Fix long lines in abci, state, and tools packages

* Fix long lines in behaviour and blockchain packages

* Fix long lines in cmd and config packages

* Begin fixing long lines in consensus package

* Finish fixing long lines in consensus package

* Add lll exclusion for lines containing URLs

* Fix long lines in crypto package

* Fix long lines in evidence package

* Fix long lines in mempool and node packages

* Fix long lines in libs package

* Fix long lines in lite package

* Fix new long line in node package

* Fix long lines in p2p package

* Ignore gocritic warning

* Fix long lines in privval package

* Fix long lines in rpc package

* Fix long lines in scripts package

* Fix long lines in state package

* Fix long lines in tools package

* Fix long lines in types package

* Enable lll linter

* Remove unnecessary type conversions

* Consolidate repeated strings into consts

* Clothe return statements

* Update blockchain/v1/reactor_fsm_test.go

Co-Authored-By: Anton Kaliaev <anton.kalyaev@gmail.com>

This PR repairs linter errors seen when running the following commands:
golangci-lint run --no-config --disable-all=true --enable=unconvert
golangci-lint run --no-config --disable-all=true --enable=goconst
golangci-lint run --no-config --disable-all=true --enable=nakedret

Contributes to #3262

- Govet issues fixed
- 1 gosec issue solved using nolint

Signed-off-by: Marko Baricevic <marbar3778@yahoo.com>

This reverts commit d02c5d1e30.

This reverts commit 96a3502

```
I[06-08|11:51:57.234] Getting UPNP external address                module=p2p
I[06-08|11:51:58.867] Got UPNP external address                    module=p2p address=
```

Fixes #1717

```
I[06-08|11:51:56.952] Starting multiAppConn                        module=proxy impl=multiAppConn
I[06-08|11:51:56.952] Starting localClient                         module=abci-client connection=query impl=localClient
I[06-08|11:51:56.952] Starting localClient                         module=abci-client connection=mempool impl=localClient
I[06-08|11:51:56.952] Starting localClient                         module=abci-client connection=consensus impl=localClient
I[06-08|11:51:56.952] ABCI Handshake                               module=consensus appHeight=0 appHash=
I[06-08|11:51:56.952] ABCI Replay Blocks                           module=consensus appHeight=0 storeHeight=0 stateHeight=0
I[06-08|11:51:57.053] Completed ABCI Handshake - Tendermint and App are synced module=consensus appHeight=0 appHash=
I[06-08|11:51:57.053] This node is a validator                     module=consensus addr=6816B5D9BAC32A3CDF07884D9D3D2650694C371D pubKey=PubKeyEd25519{27A40CD032DD2467342D0CF27C5EC92052D966FEC714B6CF2F3BF3146AFD0D51}
I[06-08|11:51:57.234] Starting Node                                module=main impl=Node
I[06-08|11:51:57.234] Starting EventBus                            module=events impl=EventBus
I[06-08|11:51:57.234] Local listener                               module=p2p ip=:: port=46656
I[06-08|11:51:57.234] Getting UPNP external address                module=p2p
I[06-08|11:51:58.867] Got UPNP external address                    module=p2p address=
I[06-08|11:51:58.867] Starting DefaultListener                     module=p2p impl=Listener(@<nil>:46656)
I[06-08|11:51:58.867] P2P Node ID                                  module=main ID=3629b516392e494ae717ac4c6a1ea7eb0fe421c3 file=/home/tpb/.tendermint/config/node_key.json
I[06-08|11:51:58.868] Add our address to book                      module=p2p book=/home/tpb/.tendermint/config/addrbook.json addr=null
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x38 pc=0x89fb86]

goroutine 1 [running]:
github.com/tendermint/tendermint/p2p.(*NetAddress).String(0x0, 0xc96e24, 0x17)
	/home/tpb/code/go/src/github.com/tendermint/tendermint/p2p/netaddress.go:171 +0x26
github.com/tendermint/tendermint/p2p/pex.(*addrBook).AddOurAddress(0xc420190620, 0x0)
	/home/tpb/code/go/src/github.com/tendermint/tendermint/p2p/pex/addrbook.go:160 +0x116
github.com/tendermint/tendermint/node.(*Node).OnStart(0xc420286d00, 0xc4201b8010, 0xd)
	/home/tpb/code/go/src/github.com/tendermint/tendermint/node/node.go:402 +0x547
github.com/tendermint/tendermint/vendor/github.com/tendermint/tmlibs/common.(*BaseService).Start(0xc420286d00, 0xe51c40, 0xc42000bd40)
	/home/tpb/code/go/src/github.com/tendermint/tendermint/vendor/github.com/tendermint/tmlibs/common/service.go:130 +0x3bd
github.com/tendermint/tendermint/cmd/tendermint/commands.NewRunNodeCmd.func1(0xc42022e000, 0xc4200acdc0, 0x0, 0x1, 0x0, 0x0)
	/home/tpb/code/go/src/github.com/tendermint/tendermint/cmd/tendermint/commands/run_node.go:58 +0xfe
github.com/tendermint/tendermint/vendor/github.com/spf13/cobra.(*Command).execute(0xc42022e000, 0xc4200acda0, 0x1, 0x1, 0xc42022e000, 0xc4200acda0)
	/home/tpb/code/go/src/github.com/tendermint/tendermint/vendor/github.com/spf13/cobra/command.go:762 +0x468
github.com/tendermint/tendermint/vendor/github.com/spf13/cobra.(*Command).ExecuteC(0x1289280, 0xbbdda0, 0xc420015e01, 0xc4201bc640)
	/home/tpb/code/go/src/github.com/tendermint/tendermint/vendor/github.com/spf13/cobra/command.go:852 +0x30a
github.com/tendermint/tendermint/vendor/github.com/spf13/cobra.(*Command).Execute(0x1289280, 0xc4201bc640, 0xc420015e98)
	/home/tpb/code/go/src/github.com/tendermint/tendermint/vendor/github.com/spf13/cobra/command.go:800 +0x2b
github.com/tendermint/tendermint/vendor/github.com/tendermint/tmlibs/cli.Executor.Execute(0x1289280, 0xde5798, 0x2, 0xc4200332c0)
	/home/tpb/code/go/src/github.com/tendermint/tendermint/vendor/github.com/tendermint/tmlibs/cli/setup.go:89 +0x4e
main.main()
	/home/tpb/code/go/src/github.com/tendermint/tendermint/cmd/tendermint/main.go:45 +0x24d
```

* use increment and decrement operators.

* remove unnecessary else branches.

* fix package comment with leading space.

* fix receiver names.

* fix error strings.

* remove omittable code.

* remove redundant return statement.

* Revert changes (code is generated.)

* use cfg as receiver name for all config-related types.

* use lsi as the receiver name for the LastSignedInfo type.