Fix potential leak

If we have closed the transport, dont try reading

Merge branch 'standalone_benchmarks' of https://github.com/dgquintas/grpc into dgquintas-standalone_benchmarks

do not request another call if server is shutdown

Flagging the QPS binaries as tools, instead of non-runnable tests.

Enable test that got forgotten

ignore PHP vendor/ folder

Polishing the new C# API

remove php composer.lock file

Validate that headers contain legal bytes

Add 'installDist' task to grpc-java Docker build

Eliminate need for SIGPIPE handling

Cleanup unlock() a little

This will allow us to not run Gradle every time we run an integration
test.

Fix server side call finalization when connection is closed.

update php composer.lock

more division of logs to make it easier to analyze test results.