[EE] Enable the Style/PreferredHashMethods cop
EE MR for https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/11883.
What does this MR do?
This enables the Style/PreferredHashMethods
cop (https://github.com/bbatsov/rubocop/blob/022e7322b731b06bd31ce5ef1bac378b27551ed0/lib/rubocop/cop/style/preferred_hash_methods.rb).
Are there points in the code the reviewer needs to double check?
Do we prefer the verbose
option maybe?