Move Python protoc plugin tests to grpcio_test
diff --git a/src/python/grpcio_test/setup.py b/src/python/grpcio_test/setup.py
index 925c327..a6203ca 100644
--- a/src/python/grpcio_test/setup.py
+++ b/src/python/grpcio_test/setup.py
@@ -48,8 +48,13 @@
 
 _PACKAGE_DATA = {
     'grpc_interop': [
-        'credentials/ca.pem', 'credentials/server1.key',
-        'credentials/server1.pem',]
+        'credentials/ca.pem',
+        'credentials/server1.key',
+        'credentials/server1.pem',
+    ],
+    'grpc_protoc_plugin': [
+        'test.proto',
+    ],
 }
 
 _SETUP_REQUIRES = (
@@ -75,5 +80,5 @@
     package_data=_PACKAGE_DATA,
     install_requires=_INSTALL_REQUIRES + _SETUP_REQUIRES,
     setup_requires=_SETUP_REQUIRES,
-    cmdclass=_COMMAND_CLASS
+    cmdclass=_COMMAND_CLASS,
 )