Improve XML reports for internal_ci.

Update  tools/run_tests/README.md 

Add UBSan to list of tests generated

Port server fixes

- correct a couple of race conditions that could result in duplicated port assignments to different processes
- enhance detection code for 'is this port in use' to be much more robust

Add static method to generated code to return fully qualified protobuf service name

Upmerge from 1.3.0 to master

Fix a bug where OP_CANCEL is completed prematurely

clang-format

Make sure we set deadline for the LB call even without a pick.

clang-format

Code clean-up in client_channel.

Improve cq_verifier error message when success does not match.

Update internal Linux CI jobs

As part of this, get the deadline from a channel arg instead of pick_args.

Interop fixes

Fix Error Refcount Bug

fix truncate bug in grpc_cli

Added a missing ref in httpcli.c. Also added a test to avoid
regression

Implement client-side load reporting for grpclb.

Fix cmake build on Windows on internal_ci

Internal CI: Add macos grpc_master job

Use run_tests_matrix.py for running internal_ci master tests

Reports GC stats in qps workers

Reintroduce a lambda capture as part of C++11-izing code