linting is no longer allowed to fail

.gitlab-ci.yml

@@ -22,7 +22,6 @@ lint-server:
   only:
     - merge_requests
     - master
-  allow_failure: true
 
 lint-client:
   stage: test
@@ -33,7 +32,6 @@ lint-client:
   only:
     - merge_requests
     - master
-  allow_failure: true
 
 build-image-latest:
   stage: build