FIX: Don't inherit all variables (especially not CI_REGISTRY_IMAGE).

.gitlab-ci.yml

@@ -65,6 +65,9 @@ unittest:
 # Trigger building of server image and integration tests
 trigger_build:
   stage: deploy
+  inherit:
+    variables:
+      - DEPLOY_REF
   variables:
     # Renaming variables.
     F_BRANCH: $CI_COMMIT_REF_NAME