Bump python protobuf dependency to 3.0.0
diff --git a/src/python/grpcio_tests/setup.py b/src/python/grpcio_tests/setup.py
index 0afaf7d..5c60eac 100644
--- a/src/python/grpcio_tests/setup.py
+++ b/src/python/grpcio_tests/setup.py
@@ -63,7 +63,7 @@
     'grpcio>=0.14.0',
     'grpcio-health-checking>=0.14.0',
     'oauth2client>=1.4.7',
-    'protobuf>=3.0.0a3',
+    'protobuf>=3.0.0',
     'six>=1.10',
 )