Merge branch 'cs-flay-no-allow-failure' into 'master'

Don't allow flay to fail.

It's passing now so there's no reason to have it set to allow failure anymore.

See merge request !6707

.gitlab-ci.yml

@@ -207,9 +207,7 @@ rubocop: *exec
 rake haml_lint: *exec
 rake scss_lint: *exec
 rake brakeman: *exec
-rake flay:
-  <<: *exec
-  allow_failure: yes
+rake flay: *exec
 license_finder: *exec
 rake downtime_check: *exec