add message

Author: sai-sunder-s

system_tests/noxfile.py

@@ -271,8 +271,9 @@ def compute_engine(session):
     session.install(*TEST_DEPENDENCIES_SYNC)
     # unset Application Default Credentials so
     # credentials are detected from environment
-    if "GOOGLE_APPLICATION_CREDENTIALS" in session.virtualenv.env:
-        del session.virtualenv.env["GOOGLE_APPLICATION_CREDENTIALS"]
+    is_present = "GOOGLE_APPLICATION_CREDENTIALS" in session.virtualenv.env
+    print(f"GOOGLE_APPLICATION_CREDENTIALS is present: {is_present}")
+    del session.virtualenv.env["GOOGLE_APPLICATION_CREDENTIALS"]
     session.install(LIBRARY_DIR)
     default(
         session,