Fix Ci::Build#artifacts_expire_in= when assigning invalid duration
Fix Ci::Build#artifacts_expire_in= when assigning invalid duration

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