Use message_id_regexp variable for the regexp
Use message_id_regexp variable for the regexp

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/8620#note_22021001

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