Make sure Repository#gitlab_ci_yml is safe to use even when repository is missing
Make sure Repository#gitlab_ci_yml is safe to use even when repository is missing

Signed-off-by: Dmitriy Zaporozhets <be23d75b156792e5acab51b196a2deb155d35d6a@gmail.com>

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