Make GitLab work with Ruby 2.2

Related issue: https://github.com/gitlabhq/gitlabhq/issues/8696

Reassigned to @jameslopez

Assignee removed

Reassigned to @jameslopez

mentioned in merge request !2534 (merged)

mentioned in issue #12507 (closed)

Added ruby label

mentioned in commit f025f80d

mentioned in commit tnir/gitlab-ce@f025f80d

Status changed to closed

mentioned in merge request gitlab-com/www-gitlab-com!1434 (merged)

We most likely be jumping straight to 2.3 - see discussion here: https://gitlab.com/gitlab-org/gitlab-ce/issues/14286#note_4650662

We are awaiting for this two issues to be solved: https://gitlab.com/gitlab-org/gitlab-ce/issues/12835 https://gitlab.com/gitlab-org/gitlab-ce/issues/12507

which actually depend on https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/3807 - issue with Allocations to be solved.

Mentioned in commit pfjason/gitlab-ce@f025f80d

mentioned in merge request !14785