Merge pull request #1382 from soltanmm/migrate

src/python/src/grpc/_adapter/_c_test.py

src/python/src/grpc/_adapter/_call.c

src/python/src/grpc/_adapter/_call.h

src/python/src/grpc/_adapter/_completion_queue.c

src/python/src/grpc/_adapter/_low_test.py

src/python/src/grpc/_adapter/_server.c

src/python/src/grpc/_adapter/_server.h

src/python/src/grpc/_adapter/_tag.c

src/python/src/grpc/_adapter/_tag.h

src/python/src/grpc/_adapter/rear.py

src/python/src/setup.py