Add 409 conflict tests
Add 409 conflict tests

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