Add feature spec to verify all 4 different states of closing issues message on Merge Request show page.
Add feature spec to verify all 4 different states of closing issues message on Merge Request show page.

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