Used cached value of project count to reduce DB load
Following !5746 (merged), backport a change from https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/637/diffs#diff-2.
Does this MR meet the acceptance criteria?
- CHANGELOG entry added
- Tests
- All builds are passing
- Conform by the style guides
-
Branch has no merge conflicts with
master(if you do - rebase it please) - Squashed related commits together