Add open_merge_requests_count method
Add open_merge_requests_count method

daiyu/gitlab-zh,iiet/iiet-git,stoplightio/gitlabhq,martijnvermaat/gitlabhq,LUMC/gitlabhq,openwide-java/gitlabhq,axilleas/gitlabhq,screenpages/gitlabhq,daiyu/gitlab-zh,ttasanen/gitlabhq,LUMC/gitlabhq,axilleas/gitlabhq,LUMC/gitlabhq,mmkassem/gitlabhq,screenpages/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,shinexiao/gitlabhq,ttasanen/gitlabhq,jirutka/gitlabhq,SVArago/gitlabhq,icedwater/gitlabhq,martijnvermaat/gitlabhq,allysonbarros/gitlabhq,darkrasid/gitlabhq,darkrasid/gitlabhq,darkrasid/gitlabhq,t-zuehlsdorff/gitlabhq,SVArago/gitlabhq,iiet/iiet-git,htve/GitlabForChinese,openwide-java/gitlabhq,dreampet/gitlab,ttasanen/gitlabhq,jirutka/gitlabhq,mr-dxdy/gitlabhq,stoplightio/gitlabhq,allysonbarros/gitlabhq,larryli/gitlabhq,larryli/gitlabhq,dplarson/gitlabhq,icedwater/gitlabhq,SVArago/gitlabhq,Soullivaneuh/gitlabhq,openwide-java/gitlabhq,Soullivaneuh/gitlabhq,screenpages/gitlabhq,icedwater/gitlabhq,darkrasid/gitlabhq,t-zuehlsdorff/gitlabhq,t-zuehlsdorff/gitlabhq,Soullivaneuh/gitlabhq,dwrensha/gitlabhq,mr-dxdy/gitlabhq,SVArago/gitlabhq,mr-dxdy/gitlabhq,icedwater/gitlabhq,dplarson/gitlabhq,openwide-java/gitlabhq,dreampet/gitlab,htve/GitlabForChinese,jirutka/gitlabhq,dreampet/gitlab,martijnvermaat/gitlabhq,dplarson/gitlabhq,larryli/gitlabhq,screenpages/gitlabhq,allysonbarros/gitlabhq,mmkassem/gitlabhq,dwrensha/gitlabhq,t-zuehlsdorff/gitlabhq,LUMC/gitlabhq,htve/GitlabForChinese,mmkassem/gitlabhq,martijnvermaat/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,daiyu/gitlab-zh,shinexiao/gitlabhq,shinexiao/gitlabhq,dplarson/gitlabhq,daiyu/gitlab-zh,mr-dxdy/gitlabhq,ttasanen/gitlabhq,shinexiao/gitlabhq,mmkassem/gitlabhq,dreampet/gitlab,dwrensha/gitlabhq,iiet/iiet-git,stoplightio/gitlabhq,dwrensha/gitlabhq,axilleas/gitlabhq,allysonbarros/gitlabhq,larryli/gitlabhq,Soullivaneuh/gitlabhq,htve/GitlabForChinese