Put .gitlab-ci.yml back to only 2.1 on master
Put .gitlab-ci.yml back to only 2.1 on master

[ci skip]

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