Backport build_auth_user for GroupSAML callback
Backport build_auth_user for GroupSAML callback

stoplightio/gitlabhq,iiet/iiet-git,iiet/iiet-git,stoplightio/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,iiet/iiet-git,mmkassem/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq