Extend migrations testing documentation
Extend migrations testing documentation

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