Ran wrong tests evaluating PR, fixes requirements in assets. (GoogleCloudPlatform#2468)

Author: gguuss

asset/cloud-client/requirements.txt

@@ -1,4 +1,4 @@
 google-cloud-storage==1.18.0
 google-cloud-asset==0.4.1
 google-cloud-resource-manager==0.29.2
-google-cloud-pubsub=1.0.2
+google-cloud-pubsub==1.0.2