Configure integration tests for notification service (GONRG-1104)

.gitlab-ci.yml

 variables:
   OSDU_GCP_APPLICATION_NAME: os-notification
+  OSDU_GCP_CLOUD_RUN_PARAMETERS: "--min-instances=1"
   OSDU_GCP_VENDOR: gcp
   OSDU_GCP_SERVICE: notification
-  OSDU_GCP_ENV_VARS: APP_PROJECT=${OSDU_GCP_PROJECT},APP_ENTITLEMENTS=${OSDU_GCP_ENTITLEMENTS_URL},APP_REGISTER=${OSDU_GCP_REGISTER_URL},APP_GOOGLEAUDIENCE=${GOOGLE_AUDIENCE}
-
+  OSDU_GCP_REGISTER_BASE_URL: https://os-register-attcrcktoa-uc.a.run.app/api/register/v1
+  OSDU_GCP_ENV_VARS: APP_PROJECT=$OSDU_GCP_PROJECT,APP_ENTITLEMENTS=$OSDU_GCP_ENTITLEMENTS_URL,APP_REGISTER=$OSDU_GCP_REGISTER_BASE_URL,APP_GOOGLEAUDIENCE=$GOOGLE_AUDIENCE
+  
   AWS_BUILD_SUBDIR: provider/notification-aws/build-aws
   AWS_TEST_SUBDIR: testing/notification-test-aws
   AWS_SERVICE: notification
@@ -50,4 +52,6 @@ include:
     file: 'cloud-providers/ibm.yml'  
 
 osdu-gcp-test:
+  variables: 
+    REGISTER_BASE_URL: $OSDU_GCP_REGISTER_BASE_URL
   allow_failure: true