* Rebased and git-squashed the commits in PR #6546

migrate abci to finalizeBlock

work on abci, proxy and mempool

abciresponse, blok events, indexer, some tests

fix some tests

fix errors

fix errors in abci

fix tests amd errors

* Fixes after rebasing PR#6546

* Restored height to RequestFinalizeBlock & other

* Fixed more UTs

* Fixed kvstore

* More UT fixes

* last TC fixed

* make format

* Update internal/consensus/mempool_test.go

Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

* Addressed @williambanfield's comments

* Fixed UTs

* Addressed last comments from @williambanfield

* make format

Co-authored-by: marbar3778 <marbar3778@yahoo.com>
Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>

This change has two main effects:

1. Remove most of the Async methods from the abci.Client interface.
   Remaining are FlushAsync, CommitTxAsync, and DeliverTxAsync.

2. Rename the synchronous methods to remove the "Sync" suffix.

The rest of the change is updating the implementations, subsets, and mocks of
the interface, along with the call sites that point to them.

* Fix stringly-typed mock stubs.
* Rename helper method.

This averts a log-after-close issue. We should probably also chase the shutdown
issues, but since ABCI clients should generally only shut down once per process
I don't think this is a real priority, and the trace is hairy.

This is a very small change, but removes a method from the
`service.Service` interface (a win!) and forces callers to explicitly
pass loggers in to objects during construction rather than (later)
injecting them. There's not a real need for this kind of lazy
construction of loggers, and I think a decent potential for confusion
for mutable loggers.

The main concern I have is that this changes the constructor API for
ABCI clients. I think this is fine, and I suspect that as we plumb
contexts through, and make changes to the RPC services there'll be a
number of similar sorts of changes to various (quasi) public
interfaces, which I think we should welcome.

`abci.Client`:

- Sync and Async methods now accept a context for cancellation
    * grpc client uses context to cancel both Sync and Async requests
    * local client ignores context parameter
    * socket client uses context to cancel Sync requests and to drop Async requests before sending them if context was cancelled prior to that

- Async methods return an error
    * socket client returns an error immediately if queue is full for Async requests
    * local client always returns nil error
    * grpc client returns an error if context was cancelled before we got response or the receiving queue had a space for response (do not confuse with the sending queue from the socket client)

- specify clients semantics in [doc.go](https://raw.githubusercontent.com/tendermint/tendermint/27112fffa62276bc016d56741f686f0f77931748/abci/client/doc.go)

`mempool.TxInfo`

- add optional `Context` to `TxInfo`, which can be used to cancel `CheckTx` request

Closes #5190

* libs/bits: inline defer and change order of mutexes

Closes #3217

* abci/client: unexpose StopForError func

a) it's not called outside
b) the reason for exposing it in the first place is unclear
c) Stop already exist if someone from outside wants to stop the client

## Description

add more error checks to tests


gonna do a third PR that tackles the non test cases

* lint: golint issue fixes

- on my local machine golint is a lot stricter than the bot so slowly going through and fixing things.

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

* more fixes from golint

* remove isPeerPersistentFn

* add changelog entry

* libs/common: refactor libs common 3

- move nil.go into types folder and make private
- move service & baseservice out of common into service pkg

ref #4147

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

* add changelog entry

* libs/common: refactor libs/common 2

- move random function to there own pkg

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

* change imports and usage throughout repo

* fix goimports

* add changelog entry

Refs https://github.com/tendermint/tendermint/pull/1891#discussion_r201339918

* Add test showing normal Sync call

* Show hanging response if server dies during BeginBlock

* Flush all in-flight requests on shutdown, not just pending requests

* Add bugfix to CHANGELOG

This reverts commit d02c5d1e30.