Update repo tools to fix tests (GoogleCloudPlatform#1462)

Author: andrewsg

testing/requirements.txt

@@ -13,5 +13,5 @@ WebTest==2.0.29
 webapp2==2.5.2
 google-api-python-client==1.6.5
 google-cloud-core==0.28.1
-gcp-devrel-py-tools==0.0.13
+gcp-devrel-py-tools==0.0.14
 flask==0.12.2