Merge branch 'security-fix/security-group-user-removal-11-7' into 'security-11-7'
[11.7] Resolve "Removing a user from a private group doesn't remove them from group's project, if their project's role was changed" See merge request gitlab/gitlabhq!2867 (cherry picked from commit 26937476710811845c7818e987cd016c43c66d1e) 0eef2f34 Add subresources removal to member destroy service