Broken master: Tests failed after "schema_version_check rake task" for nil errors

Job #242366276 failed for f291aae8:

This was broken by https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/29882

The subsequent test after:

schema_version_check rake task
  allows migrations on databases meeting the min schema version requirement
  raises an error when schema version is too old to migrate
  skips running validation when passed the skip env variable
  allows migrations on fresh databases

Gave tons of nil errors:

TestHooks::SystemService
  #execute
    hook with not implemented test

1st Try error in ./spec/services/test_hooks/system_service_spec.rb:21:
undefined method `[]' for nil:NilClass

We can see this from full log