To execute the integration.sh, you need to run "source ./integration.sh". just execute command "./integration.sh" will not work.
It is because "source ~/.profile" executes in a separate shell than the integration.sh script
# **turn on the go module, default is auto. The value is off, if tendermint source code
#is downloaded under $GOPATH/src directory
echo "export GO111MODULE=on" >> ~/.profile
# ** use git clone instead of go get.
# once go module is on, go get will download source code to
# specific version directory under $GOPATH/pkg/mod the make
# script will not work
git clone https://github.com/tendermint/tendermint.git
#** need to install the package, otherwise tendermint testnet will not execute
make install