Only ensure against yield so that pool should be available
Only ensure against yield so that pool should be available

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9192#note_23293693

dplarson/gitlabhq,axilleas/gitlabhq,dplarson/gitlabhq,t-zuehlsdorff/gitlabhq,t-zuehlsdorff/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,LUMC/gitlabhq,htve/GitlabForChinese,stoplightio/gitlabhq,darkrasid/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,stoplightio/gitlabhq,darkrasid/gitlabhq,LUMC/gitlabhq,LUMC/gitlabhq,dplarson/gitlabhq,htve/GitlabForChinese,dreampet/gitlab,iiet/iiet-git,t-zuehlsdorff/gitlabhq,htve/GitlabForChinese,dreampet/gitlab,jirutka/gitlabhq,darkrasid/gitlabhq,dplarson/gitlabhq,dreampet/gitlab,iiet/iiet-git,axilleas/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,t-zuehlsdorff/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,htve/GitlabForChinese,jirutka/gitlabhq,axilleas/gitlabhq,LUMC/gitlabhq