Merge pull request #8371 from yang-g/server_context_spouse

Makefile

build.yaml

include/grpc++/impl/codegen/server_context.h

include/grpc++/test/server_context_test_spouse.h

src/cpp/test/server_context_test_spouse.cc

test/cpp/test/server_context_test_spouse_test.cc

tools/run_tests/sources_and_headers.json

tools/run_tests/tests.json

vsprojects/vcxproj/test/grpc++_test/grpc++_test.vcxproj

...ects/vcxproj/test/grpc++_test/grpc++_test.vcxproj.filters

..._test_spouse_test/server_context_test_spouse_test.vcxproj

...ouse_test/server_context_test_spouse_test.vcxproj.filters