add --check-contrib to CI check

.gitlab-ci.yml

@@ -40,6 +40,6 @@ check_style:
     - echo "List of files to be checked $eb_list"
     - for i in $eb_list; do
     - echo "Checking $(basename $i) ..."
-    - eb --check-style $i || faulty="$faulty $i"
+    - eb --check-style --check-contrib $i || faulty="$faulty $i"
     - done
     - if [ -n "$faulty" ]; then echo "Faulty EasyConfigs... $faulty"; exit 1; fi