Replace GCLOUD_PROJECT with GOOGLE_CLOUD_PROJECT. [(#4022)](GoogleCloudPlatform/python-docs-samples#4022)

Author: kurtisvg

samples/snippets/iam_test.py

@@ -21,7 +21,7 @@
 import iam
 
 UUID = uuid.uuid4().hex
-PROJECT = os.environ["GCLOUD_PROJECT"]
+PROJECT = os.environ["GOOGLE_CLOUD_PROJECT"]
 TOPIC = "iam-test-topic-" + UUID
 SUBSCRIPTION = "iam-test-subscription-" + UUID
 

samples/snippets/publisher_test.py

@@ -24,7 +24,7 @@
 import publisher
 
 UUID = uuid.uuid4().hex
-PROJECT = os.environ["GCLOUD_PROJECT"]
+PROJECT = os.environ["GOOGLE_CLOUD_PROJECT"]
 TOPIC_ADMIN = "publisher-test-topic-admin-" + UUID
 TOPIC_PUBLISH = "publisher-test-topic-publish-" + UUID
 

samples/snippets/quickstart/pub_test.py

@@ -25,7 +25,7 @@
 
 
 UUID = uuid.uuid4().hex
-PROJECT = os.environ["GCLOUD_PROJECT"]
+PROJECT = os.environ["GOOGLE_CLOUD_PROJECT"]
 TOPIC = "quickstart-pub-test-topic-" + UUID
 
 

samples/snippets/quickstart/sub_test.py

@@ -25,7 +25,7 @@
 
 
 UUID = uuid.uuid4().hex
-PROJECT = os.environ["GCLOUD_PROJECT"]
+PROJECT = os.environ["GOOGLE_CLOUD_PROJECT"]
 TOPIC = "quickstart-sub-test-topic-" + UUID
 SUBSCRIPTION = "quickstart-sub-test-topic-sub-" + UUID
 

samples/snippets/subscriber_test.py

@@ -22,7 +22,7 @@
 import subscriber
 
 UUID = uuid.uuid4().hex
-PROJECT = os.environ["GCLOUD_PROJECT"]
+PROJECT = os.environ["GOOGLE_CLOUD_PROJECT"]
 TOPIC = "subscription-test-topic-" + UUID
 DEAD_LETTER_TOPIC = "subscription-test-dead-letter-topic-" + UUID
 SUBSCRIPTION_ADMIN = "subscription-test-subscription-admin-" + UUID