Add unique index on custom_fields_projects.
Add unique index on custom_fields_trackers (#13059).
German "label_in" translation changed by Filou Centrinov (#13080)
Gemfile: unpin mocha version
This is pinned by r10155 and r10167 due to CI server failure.
Traditional Chinese translation updated by ChunChang Lo (#13071)
remove "test-unit" from Gemfile
This is added by r10137 (#10320, #10818) and shoulda version was upgraded by r11324.
Upgrade shoulda.
Create all databases.
Dup generated attributes.
Removed unused fixtures.
