Update mysql2 gem.
Update mysql2 gem.

luzhongyang/gitlabhq,TheWatcher/gitlabhq,fendoudeqingchunhh/gitlabhq,Soullivaneuh/gitlabhq,martijnvermaat/gitlabhq,fantasywind/gitlabhq,mathstuf/gitlabhq,tempbottle/gitlabhq,koreamic/gitlabhq,mathstuf/gitlabhq,sekcheong/gitlabhq,ikappas/gitlabhq,NKMR6194/gitlabhq,NKMR6194/gitlabhq,louahola/gitlabhq,jaepyoung/gitlabhq,openwide-java/gitlabhq,daiyu/gitlab-zh,SVArago/gitlabhq,hq804116393/gitlabhq,dplarson/gitlabhq,nguyen-tien-mulodo/gitlabhq,rebecamendez/gitlabhq,jvanbaarsen/gitlabhq,copystudy/gitlabhq,darkrasid/gitlabhq,sue445/gitlabhq,hq804116393/gitlabhq,it33/gitlabhq,copystudy/gitlabhq,Soullivaneuh/gitlabhq,atomaka/gitlabhq,allysonbarros/gitlabhq,Kambda/Mobbr,ngpestelos/gitlabhq,yuyue2013/ss,sakishum/gitlabhq,chadyred/gitlabhq,dreampet/gitlab,ayufan/gitlabhq,julianengel/gitlabhq,cui-liqiang/gitlab-ce,jirutka/gitlabhq,chadyred/gitlabhq,mr-dxdy/gitlabhq,hacsoc/gitlabhq,allistera/gitlabhq,stoplightio/gitlabhq,tk23/gitlabhq,NARKOZ/gitlabhq,eliasp/gitlabhq,johnmyqin/gitlabhq,allysonbarros/gitlabhq,mente/gitlabhq,ferdinandrosario/gitlabhq,eliasp/gitlabhq,ttasanen/gitlabhq,mavimo/gitlabhq,Razer6/gitlabhq,t-zuehlsdorff/gitlabhq,NuLL3rr0r/gitlabhq,childbamboo/gitlabhq,Tyrael/gitlabhq,Datacom/gitlabhq,szechyjs/gitlabhq,revaret/gitlabhq,gorgee/gitlabhq,shinexiao/gitlabhq,DanielZhangQingLong/gitlabhq,mrb/gitlabhq,mavimo/gitlabhq,Keystion/gitlabhq,ikappas/gitlabhq,zBMNForks/gitlabhq,fantasywind/gitlabhq,ZeoAlliance/gitlabhq,fpgentil/gitlabhq,dukex/gitlabhq,bladealslayer/gitlabhq,zrbsprite/gitlabhq,pkgr/gitlabhq,Tyrael/gitlabhq,bigsurge/gitlabhq,mente/gitlabhq,larryli/gitlabhq,yama07/gitlabhq,yulchitaj/TEST3,michaKFromParis/gitlabhqold,ayufan/gitlabhq,ibiart/gitlabhq,per-garden/gitlabhq,ayufan/gitlabhq,ZeoAlliance/gitlabhq,gopeter/gitlabhq,NuLL3rr0r/gitlabhq,mmkassem/gitlabhq,Devin001/gitlabhq,childbamboo/gitlabhq,fearenales/gitlabhq,Soullivaneuh/gitlabhq,yatish27/gitlabhq,eliasp/gitlabhq,yatish27/gitlabhq,whluwit/gitlabhq,rhels/gitlabhq,dreampet/gitlab,LUMC/gitlabhq,WSDC-NITWarangal/gitlabhq,WSDC-NITWarangal/gitlabhq,delkyd/gitlabhq,folpindo/gitlabhq,bbodenmiller/gitlabhq,Kambda/mobbr-gitlabhq,Telekom-PD/gitlabhq,gopeter/gitlabhq,aaronsnyder/gitlabhq,htve/GitlabForChinese,stellamiranda/mobbr-gitlabhq,kitech/gitlabhq,123Haynes/gitlabhq,LUMC/gitlabhq,SVArago/gitlabhq,sekcheong/gitlabhq,it33/gitlabhq,Devin001/gitlabhq,koreamic/gitlabhq,kemenaran/gitlabhq,Razer6/gitlabhq,axilleas/gitlabhq,nmav/gitlabhq,kitech/gitlabhq,allysonbarros/gitlabhq,koreamic/gitlabhq,htve/GitlabForChinese,flashbuckets/gitlabhq,since2014/gitlabhq,vjustov/gitlabhq,ngpestelos/gitlabhq,shinexiao/gitlabhq,jirutka/gitlabhq,windymid/test2,Razer6/gitlabhq,wangcan2014/gitlabhq,julianengel/gitlabhq,michaKFromParis/gitlabhqold,Burick/gitlabhq,mrb/gitlabhq,cui-liqiang/gitlab-ce,yama07/gitlabhq,fantasywind/gitlabhq,flashbuckets/gitlabhq,NARKOZ/gitlabhq,Exeia/gitlabhq,youprofit/gitlabhq,screenpages/gitlabhq,H3Chief/gitlabhq,rumpelsepp/gitlabhq,htve/GitlabForChinese,jirutka/gitlabhq,whluwit/gitlabhq,ZeoAlliance/gitlabhq,cncodog/gitlab,pulkit21/gitlabhq,adaiguoguo/gitlab_globalserarch,wangcan2014/gitlabhq,ksoichiro/gitlabhq,larryli/gitlabhq,rebecamendez/gitlabhq,michaKFromParis/gitlabhqold,initiummedia/gitlabhq,theonlydoo/gitlabhq,cncodog/gitlab,LUMC/gitlabhq,tk23/gitlabhq,ksoichiro/gitlabhq,folpindo/gitlabhq,mmkassem/gitlabhq,rebecamendez/gitlabhq,zBMNForks/gitlabhq,atomaka/gitlabhq,sue445/gitlabhq,jrjang/gitlabhq,ngpestelos/gitlabhq,luzhongyang/gitlabhq,Kambda/mobbr-gitlabhq,tempbottle/gitlabhq,Razer6/gitlabhq,williamherry/gitlabhq,Kambda/Mobbr,adaiguoguo/gitlab_globalserarch,yulchitaj/TEST3,nmav/gitlabhq,fendoudeqingchunhh/gitlabhq,hzy001/gitlabhq,hacsoc/gitlabhq,jrjang/gitlabhq,tim-hoff/gitlabhq,Telekom-PD/gitlabhq,Telekom-PD/gitlabhq,sue445/gitlabhq,allistera/gitlabhq,joalmeid/gitlabhq,rfeese/gitlab-ce,H3Chief/gitlabhq,yulchitaj/TEST3,vjustov/gitlabhq,DanielZhangQingLong/gitlabhq,julianengel/gitlabhq,shinexiao/gitlabhq,lvfeng1130/gitlabhq,bladealslayer/gitlabhq,michaKFromParis/gitlabhq,ordiychen/gitlabhq,michaKFromParis/sparkslab,dukex/gitlabhq,michaKFromParis/sparkslab,mr-dxdy/gitlabhq,screenpages/gitlabhq,yonglehou/gitlabhq,TheWatcher/gitlabhq,hacsoc/gitlabhq,lvfeng1130/gitlabhq,kitech/gitlabhq,Exeia/gitlabhq,sekcheong/gitlabhq,SVArago/gitlabhq,SVArago/gitlabhq,t-zuehlsdorff/gitlabhq,mmkassem/gitlabhq,pjknkda/gitlabhq,it33/gitlabhq,TheWatcher/gitlabhq,jrjang/gitlabhq,sakishum/gitlabhq,revaret/gitlabhq,H3Chief/gitlabhq,gorgee/gitlabhq,hzy001/gitlabhq,tim-hoff/gitlabhq,rumpelsepp/gitlabhq,Burick/gitlabhq,fearenales/gitlabhq,sonalkr132/gitlabhq,ferdinandrosario/gitlabhq,youprofit/gitlabhq,daiyu/gitlab-zh,ferdinandrosario/gitlabhq,akumetsuv/gitlab,ttasanen/gitlabhq,aaronsnyder/gitlabhq,dukex/gitlabhq,theodi/gitlabhq,chadyred/gitlabhq,atomaka/gitlabhq,openwide-java/gitlabhq,jrjang/gitlab-ce,fpgentil/gitlabhq,OlegGirko/gitlab-ce,theonlydoo/gitlabhq,SkyWei/gitlabhq,daiyu/gitlab-zh,xuvw/gitlabhq,michaKFromParis/gitlabhqold,sonalkr132/gitlabhq,folpindo/gitlabhq,nguye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