allow tag builds to fail since tags are seldom updated in the source repo

.gitlab-ci.yml

@@ -44,6 +44,7 @@ trigger_tag_builds:
       - artifact: 'build-tags.yml'
         job: prep_missing_tags
     strategy: depend
+  allow_failure: true
     
 build_latest:
   image: docker:latest

template-build-tags.yml

@@ -27,4 +27,5 @@ build_tags:
       echo "Building tag {$TAG}"
       git checkout tags/v$TAG
       docker build -t $REGISTRY_URL/$IMAGE_NAME:$TAG -f docker/Dockerfile .
-      docker push $REGISTRY_URL/$IMAGE_NAME:$TAG 
+      docker push $REGISTRY_URL/$IMAGE_NAME:$TAG
\ No newline at end of file
+  allow_failure: true
\ No newline at end of file