Remove x-json mime_type, rename to json_mime_types.
Remove x-json mime_type, rename to json_mime_types.

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