Include interop tests in python_tests.json

tools/run_tests/build_python.sh

@@ -39,3 +39,4 @@ virtualenv -p /usr/bin/python2.7 python2.7_virtual_environment
 source python2.7_virtual_environment/bin/activate
 pip install enum34==1.0.4 futures==2.2.0 protobuf==3.0.0-alpha-1
 CFLAGS=-I$root/include LDFLAGS=-L$root/libs/opt pip install src/python/src
+pip install src/python/interop

tools/run_tests/python_tests.json

@@ -46,5 +46,11 @@
   },
   {
     "module": "grpc.framework.foundation._logging_pool_test"
+  },
+  {
+    "module": "interop._insecure_interop_test"
+  },
+  {
+    "module": "interop._secure_interop_test"
   }
 ]