Changing name of testing environment variables

Author: mr-mcox

pandas_gbq/tests/test_gbq.py

@@ -19,8 +19,8 @@
 import pandas.util.testing as tm
 from pandas.compat.numpy import np_datetime64_compat
 
-PROJECT_ID = os.getenv('PROJECT_ID')
-PRIVATE_KEY_JSON_PATH = os.getenv('PRIVATE_KEY_JSON_PATH')
+PROJECT_ID = os.getenv('GOOGLE_CLOUD_PROJECT')
+PRIVATE_KEY_JSON_PATH = os.getenv('GOOGLE_APPLICATION_CREDENTIALS')
 PRIVATE_KEY_JSON_CONTENTS = os.getenv('PRIVATE_KEY_JSON_CONTENTS')
 
 TABLE_ID = 'new_test'