Relax rake backup regex to handle CE and EE RCs
Relax rake backup regex to handle CE and EE RCs

See http://rubular.com/r/uTDlT85zW1

dreampet/gitlab,stoplightio/gitlabhq,dreampet/gitlab,jirutka/gitlabhq,iiet/iiet-git,dplarson/gitlabhq,iiet/iiet-git,t-zuehlsdorff/gitlabhq,stoplightio/gitlabhq,dplarson/gitlabhq,axilleas/gitlabhq,dreampet/gitlab,iiet/iiet-git,jirutka/gitlabhq,mmkassem/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,dplarson/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,axilleas/gitlabhq,dplarson/gitlabhq,mmkassem/gitlabhq,t-zuehlsdorff/gitlabhq,t-zuehlsdorff/gitlabhq,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,axilleas/gitlabhq,iiet/iiet-git,stoplightio/gitlabhq