* master: (51 commits)
Move locked check to a guard-clause
Ci::Build tag is a trait instead of an own factory
[CE backport] Saved configuration for issue board
Use the correct project visibility in system hooks
Add changelog
more readable changelog
Make merge_jid handling less stateful in MergeService
Fetch the merged branches at once
remove extra whitespace
use a delegate for `username` to be more future friendly
Merging EE doc into CE
add changelog entry
Avoid using Rugged in Gitlab::Git::Wiki#preview_slug
Cache commits on the repository model
Remove groups_select from global namespace & simplifies the code
Change default disabled merge request widget message to "Merge is not allowed yet"
Semi-linear history merge is now available in CE.
Remove repetitive karma spec
Improve spec to check hidden component
Rename to shouldShowUsername
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