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

.gitlab-ci.yml

@@ -65,6 +65,8 @@ unittest:
 # Trigger building of server image and integration tests
 trigger_build:
   stage: deploy
+  inherit:
+    variables: false
   variables:
     # Renaming variables.
     F_BRANCH: $CI_COMMIT_REF_NAME