[Rails5] Fix `storage_counter` helper
[Rails5] Fix `storage_counter` helper

Since rails 5 beta 2 support of petabytes and exabytes were added to the
`number_to_human*` methods.
See https://github.com/rails/rails/pull/22759

So for rails5 the comma separator gets shown for big numbers (EBs).

axilleas/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,stoplightio/gitlabhq,dreampet/gitlab,iiet/iiet-git,iiet/iiet-git,dreampet/gitlab,jirutka/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,mmkassem/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,mmkassem/gitlabhq,jirutka/gitlabhq,jirutka/gitlabhq,dreampet/gitlab,dreampet/gitlab,axilleas/gitlabhq,stoplightio/gitlabhq,axilleas/gitlabhq