Trace: Allow kwargs to be passed to create_channel, update templates (via synth).

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/trace/synth.py. synthtool > Ensuring dependencies. synthtool > Pulling artman image. latest: Pulling from googleapis/artman Digest: sha256:b036a7f4278d9deb5796f065e5c7f608d47d75369985ca7ab5039998120e972d Status: Image is up to date for googleapis/artman:latest synthtool > Cloning googleapis. synthtool > Running generator for google/devtools/cloudtrace/artman_cloudtrace_v1.yaml. synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v1. synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/devtools/cloudtrace/v1/trace.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v1/google/cloud/trace_v1/proto/trace.proto synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v1/google/cloud/trace_v1/proto. synthtool > Replaced 'from google.devtools.cloudtrace_v1.proto import ' in google/cloud/trace_v1/proto/trace_pb2_grpc.py. synthtool > Running generator for google/devtools/cloudtrace/artman_cloudtrace_v2.yaml. synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v2. synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/devtools/cloudtrace/v2/trace.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v2/google/cloud/trace_v2/proto/trace.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/devtools/cloudtrace/v2/tracing.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v2/google/cloud/trace_v2/proto/tracing.proto synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v2/google/cloud/trace_v2/proto. synthtool > Replaced 'from google.devtools.cloudtrace_v2.proto import ' in google/cloud/trace_v2/proto/tracing_pb2_grpc.py. synthtool > Replaced 'from google.devtools.cloudtrace_v2.proto import ' in google/cloud/trace_v2/proto/tracing_pb2.py. .coveragerc .flake8 MANIFEST.in noxfile.py.j2 setup.cfg Running session blacken Creating virtualenv using python3.6 in .nox/blacken pip install black black google tests docs reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/__init__.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/gapic/enums.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/docs/conf.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/gapic/trace_service_client_config.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/gapic/transports/trace_service_grpc_transport.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/types.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/__init__.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/proto/trace_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/gapic/enums.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/gapic/trace_service_client_config.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/gapic/transports/trace_service_grpc_transport.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/gapic/trace_service_client.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/proto/trace_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/gapic/trace_service_client.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/proto/tracing_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/proto/tracing_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/types.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/tests/unit/gapic/v2/test_trace_service_client_v2.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/tests/unit/gapic/v1/test_trace_service_client_v1.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/proto/trace_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/proto/trace_pb2.py All done! ✨ 🍰 ✨ 21 files reformatted, 24 files left unchanged. Session blacken was successful. synthtool > Cleaned up 2 temporary directories. synthtool > Wrote metadata to synth.metadata.