Wrap ParseCommandLineFlags in InitTest

Get GRPC_TRACE tcp working again

Get run_tests.py forever mode working again

Return 1 when test_case is not supported in interop test

Registered calls

Updates gem dependencies, style rules

Correct storage classes of variables an functions

Removes nodejs pubsub example

Grpc ruby add interop cancellation tests

They don't need to be extern

Prevent symbol cache variables from being instantiated multipe times.

They do not need to be extern.

- Ensures that invalid status are raised as exceptions
- Ensures that exceptions during the write thread are bubbled up to the starting
  thread

Also - improves the debug messages during the BiDi calls

- uses Forwardable to provide access the @call within an ActiveCall
- removes redundant methods from ActiveCall

Inserts latency profiling timers at various interesting points.

Remove outdated protos

Batch unref metadata in HTTP/2 stream encoder

Removing some bashisms.