setting channel args --draft

clang-format

Ruby Advanced Interop Client Side

Regenerate project to make jenkins happy

Handshaker plugin mechanism

Expunge vs2010 references

Update link to CoApp installer

Add note to help diagnose disk space errors with docker

images.

Stub documentation for core modules

Small improvements to generated documentation

v1.0.x manual upmerge.

The custom_metadata test uses response_parameters for FullDuplexCall

Enable advanced Java interop tests

Use `grpc_closure`s in `grpc_timer`s

Start some performance notes

FullDuplexCall

Add response parameters to custom_metadata streaming request for Node and PHP
clients.

The Java server does not respond with separate initial and trailing
metadata when there is no response data - it is only emiting the
requested trailing metadata. Adding the response parameters to the test
(in accordance with the specification) avoids this, but I will open a
separate issue to investigate the Java behavior.

Manual resolution:

- New test added in src/python/grpcio_test/tests/tests.json

- Timeout-related edits resolved in tools/run_tests/run_tests.py

Manual changes:

- Pass request iterator rather than request sequence in
  _reflection_servicer_test.py

Support long grpc-messages on abnormal close path

Adding Bazel tests.

Fix slice/exec_ctx interactions

Ruby Advanced Interop Server Side

Fixing submodules sanity.

Faster test building: avoid repeated linking