Add if exists to drop command
Add if exists to drop command

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