CallOptions fluent methods

temporarily disable csharp_protobuf_async_streaming_qps_unconstrained

Temporarily disable cpp_single_channel_troughput

Casting fixes for gcc 6.0

Rollup of changes from latest import

Keep out performance tests that don't have scenarios

Benchmarking: fine tune scenario configuration

Expand client fuzzer corpus

Cleanup tools/jenkins/run_performance.sh script

input

Actually fail on benchmark scenario failure.

Add unary pingpong scenarios for c++

Upgrade go docker image to golang:1.5

Add various options to verify ssl/tls client cert including letting the application handle the authentication.

Generalized nanopb generator script

Delete qps_driver and dependent scripts, add quit to qps_json_driver

Fix some of the scenarios core limits, thread limits, and depth

Enable core-dumps for stress clients and servers when launching stress tests in GKE

Fix crash in pick_first.c if all subchannels turn out to be bad

Update boringssl to latest chromium-stable.