fixes the `block_removed_ldap_users` rake task
fixes the `block_removed_ldap_users` rake task

In e23a26a (and later 1bc9936) the API for Gitlab::LDAP::Adapter was
changed. I assume this rake task was an oversight in the refactoring of
the changed class.

While being on it, I noticed that already blocked users cannot be
blocked again.

liyakun/gitlabhq,sue445/gitlabhq,darkrasid/gitlabhq,stanhu/gitlabhq,michaKFromParis/sparkslab,theonlydoo/gitlabhq,xuvw/gitlabhq,kemenaran/gitlabhq,screenpages/gitlabhq,yama07/gitlabhq,yuyue2013/ss,rhels/gitlabhq,k4zzk/gitlabhq,NKMR6194/gitlabhq,sekcheong/gitlabhq,atomaka/gitlabhq,williamherry/gitlabhq,jirutka/gitlabhq,johnmyqin/gitlabhq,TheWatcher/gitlabhq,stanhu/gitlabhq,aaronsnyder/gitlabhq,rhels/gitlabhq,mavimo/gitlabhq,dvrylc/gitlabhq,icedwater/gitlabhq,8thcolor/testing-public-gitlabhq,chadyred/gitlabhq,dvrylc/gitlabhq,fearenales/gitlabhq,fgbreel/gitlabhq,htve/GitlabForChinese,childbamboo/gitlabhq,mente/gitlabhq,ferdinandrosario/gitlabhq,yatish27/gitlabhq,copystudy/gitlabhq,mr-dxdy/gitlabhq,mente/gitlabhq,hacsoc/gitlabhq,gorgee/gitlabhq,fpgentil/gitlabhq,fgbreel/gitlabhq,ibiart/gitlabhq,luzhongyang/gitlabhq,LytayTOUCH/gitlabhq,fearenales/gitlabhq,jaepyoung/gitlabhq,Burick/gitlabhq,michaKFromParis/gitlabhqold,johnmyqin/gitlabhq,michaKFromParis/sparkslab,zBMNForks/gitlabhq,yuyue2013/ss,hq804116393/gitlabhq,adaiguoguo/gitlab_globalserarch,wangcan2014/gitlabhq,Soullivaneuh/gitlabhq,theodi/gitlabhq,OlegGirko/gitlab-ce,rumpelsepp/gitlabhq,t-zuehlsdorff/gitlabhq,Tyrael/gitlabhq,duduribeiro/gitlabhq,sue445/gitlabhq,stanhu/gitlabhq,htve/GitlabForChinese,sideci-sample/sideci-sample-gitlabhq,it33/gitlabhq,mrb/gitlabhq,fscherwi/gitlabhq,LytayTOUCH/gitlabhq,fendoudeqingchunhh/gitlabhq,dukex/gitlabhq,cinderblock/gitlabhq,dvrylc/gitlabhq,WSDC-NITWarangal/gitlabhq,theodi/gitlabhq,theonlydoo/gitlabhq,tim-hoff/gitlabhq,SkyWei/gitlabhq,mr-dxdy/gitlabhq,stellamiranda/mobbr-gitlabhq,dreampet/gitlab,michaKFromParis/gitlabhqold,SVArago/gitlabhq,Burick/gitlabhq,MauriceMohlek/gitlabhq,Tyrael/gitlabhq,rumpelsepp/gitlabhq,mmkassem/gitlabhq,openwide-java/gitlabhq,Devin001/gitlabhq,fendoudeqingchunhh/gitlabhq,jirutka/gitlabhq,salipro4ever/gitlabhq,ksoichiro/gitlabhq,Devin001/gitlabhq,eliasp/gitlabhq,Telekom-PD/gitlabhq,iiet/iiet-git,phinfonet/mobbr-gitlabhq,shinexiao/gitlabhq,yfaizal/gitlabhq,eliasp/gitlabhq,fpgentil/gitlabhq,fscherwi/gitlabhq,WSDC-NITWarangal/gitlabhq,yulchitaj/TEST3,mmkassem/gitlabhq,luzhongyang/gitlabhq,koreamic/gitlabhq,adaiguoguo/gitlab_globalserarch,gopeter/gitlabhq,it33/gitlabhq,dwrensha/gitlabhq,bozaro/gitlabhq,rebecamendez/gitlabhq,darkrasid/gitlabhq,yfaizal/gitlabhq,dplarson/gitlabhq,chadyred/gitlabhq,it33/gitlabhq,phinfonet/mobbr-gitlabhq,pjknkda/gitlabhq,chadyred/gitlabhq,LUMC/gitlabhq,Soullivaneuh/gitlabhq,dreampet/gitlab,jrjang/gitlab-ce,initiummedia/gitlabhq,sue445/gitlabhq,fearenales/gitlabhq,zBMNForks/gitlabhq,martijnvermaat/gitlabhq,tempbottle/gitlabhq,bozaro/gitlabhq,jrjang/gitlabhq,cui-liqiang/gitlab-ce,adaiguoguo/gitlab_globalserarch,icedwater/gitlabhq,shinexiao/gitlabhq,sonalkr132/gitlabhq,koreamic/gitlabhq,fscherwi/gitlabhq,atomaka/gitlabhq,Razer6/gitlabhq,mathstuf/gitlabhq,tempbottle/gitlabhq,yonglehou/gitlabhq,hq804116393/gitlabhq,sakishum/gitlabhq,ttasanen/gitlabhq,zrbsprite/gitlabhq,manfer/gitlabhq,LUMC/gitlabhq,stoplightio/gitlabhq,OtkurBiz/gitlabhq,delkyd/gitlabhq,vjustov/gitlabhq,koreamic/gitlabhq,t-zuehlsdorff/gitlabhq,dukex/gitlabhq,allysonbarros/gitlabhq,michaKFromParis/gitlabhqold,youprofit/gitlabhq,michaKFromParis/gitlabhq,flashbuckets/gitlabhq,MauriceMohlek/gitlabhq,8thcolor/testing-public-gitlabhq,childbamboo/gitlabhq,SkyWei/gitlabhq,axilleas/gitlabhq,whluwit/gitlabhq,martinma4/gitlabhq,k4zzk/gitlabhq,chenrui2014/gitlabhq,allistera/gitlabhq,mathstuf/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,NKMR6194/gitlabhq,initiummedia/gitlabhq,rumpelsepp/gitlabhq,ferdinandrosario/gitlabhq,kemenaran/gitlabhq,tk23/gitlabhq,mathstuf/gitlabhq,childbamboo/gitlabhq,liyakun/gitlabhq,dplarson/gitlabhq,folpindo/gitlabhq,larryli/gitlabhq,salipro4ever/gitlabhq,michaKFromParis/gitlabhqold,cncodog/gitlab,dwrensha/gitlabhq,tk23/gitlabhq,NuLL3rr0r/gitlabhq,yulchitaj/TEST3,tim-hoff/gitlabhq,szechyjs/gitlabhq,ttasanen/gitlabhq,H3Chief/gitlabhq,ordiychen/gitlabhq,julianengel/gitlabhq,stoplightio/gitlabhq,per-garden/gitlabhq,axilleas/gitlabhq,Kambda/mobbr-gitlabhq,mente/gitlabhq,cinderblock/gitlabhq,jrjang/gitlab-ce,chenrui2014/gitlabhq,ayufan/gitlabhq,fgbreel/gitlabhq,NKMR6194/gitlabhq,duduribeiro/gitlabhq,ordiychen/gitlabhq,gorgee/gitlabhq,yama07/gitlabhq,gorgee/gitlabhq,ferdinandrosario/gitlabhq,revaret/gitlabhq,kemenaran/gitlabhq,Exeia/gitlabhq,ayufan/gitlabhq,ordiychen/gitlabhq,salipro4ever/gitlabhq,ttasanen/gitlabhq,fantasywind/gitlabhq,rebecamendez/gitlabhq,michaKFromParis/gitlabhq,martijnvermaat/gitlabhq,Kambda/Mobbr,gopeter/gitlabhq,fpgentil/gitlabhq,williamherry/gitlabhq,adaiguoguo/gitlab_globalserarch,OtkurBiz/gitlabhq,bozaro/gitlabhq,bigsurge/gitlabhq,mrb/gitlabhq,ZeoAlliance/gitlabhq,LytayTOUCH/gitlabhq,OlegGirko/gitlab-ce,axilleas/gitlabhq,pulkit21/gitlabhq,joalmeid/gitlabhq,Burick/gitlabhq,joalmeid/gitlabhq,sonalkr132/gitlabhq,bbodenmiller/gitlabhq,allistera/gitlabhq,chenrui2014/gitlabhq,lvfeng1130/gitlabhq,since2014/gitlabhq,fendoudeqingchunhh/gitlabhq,wangcan2014/gitlabhq,Burick/gitlabhq,julianengel/gitlabhq,shinexiao/gitlabhq,allysonbarros/gitlabhq,delkyd/gitlabhq,nmav/gitlabhq,ttasanen/gitlabhq,kitech/gitlabhq,t-zuehlsdorff/gitlabhq,screenpages/gitlabhq,jirutka/gitlabhq,cinderblock/gitlabhq,theonlydoo/gitlabhq,dwrensha/gitlabhq,jvanbaarsen/gitlabhq,theonlydoo/gitlabhq,nguyen-tien-mulodo/gitlabhq,zrbsprite/gitlabhq,sakishum/gitlabhq,per-garden/gitlabhq,flashbuckets/gitlabhq,szechyjs/gitlabhq,kemenaran/gitlabhq,michaKFromParis/sparkslab,lvfeng1130/gitlabhq,dukex/gitlabhq,Tyrael/gitlabhq,copystudy/gitlabhq,liyakun/gitlabhq,cinderblock/gitlabhq,daiyu/gitlab-zh,ngpestelos/gitlabhq,sakishum/gitlabhq,Razer6/gitlabhq,SVArago/gitlabhq,OlegGirko/gitlab-ce,t-zuehlsdorff/gitlabhq,Kambda/Mobbr,NARKOZ/gitlabhq,chadyred/gitlabhq,ikappas/gitlabhq,ksoichiro/gitlabhq,nmav/gitlabhq,michaKFromParis/gitlabhq,yulchitaj/TEST3,theodi/gitlabhq,cui-liqiang/gitlab-ce,jrjang/gitlab-ce,hzy001/gitlabhq,jrjang/gitlabhq,martinma4/gitlabhq,xuvw/gitlabhq,SkyWei/gitlabhq,whluwit/gitlabhq,NuLL3rr0r/gitlabhq,rhels/gitlabhq,yonglehou/gitlabhq,LUMC/gitlabhq,tim-hoff/gitlabhq,aaronsnyder/gitlabhq,MauriceMohlek/gitlabhq,TheWatcher/gitlabhq,shinexiao/gitlabhq,zBMNForks/gitlabhq,copystudy/gitlabhq,Datacom/gitlabhq,eliasp/gitlabhq,stellamiranda/mobbr-gitlabhq,mr-dxdy/gitlabhq,bozaro/gitlabhq,copystudy/gitlabhq,Datacom/gitlabhq,nmav/gitlabhq,DanielZhangQingLong/gitlabhq,ngpestelos/gitlabhq,ikappas/gitlabhq,fendoudeqingchunhh/gitlabhq,lvfeng1130/gitlabhq,wangcan2014/gitlabhq,hq804116393/gitlabhq,delkyd/gitlabhq,dplarson/gitlabhq,ksoichiro/gitlabhq,darkrasid/gitlabhq,ikappas/gitlabhq,martijnvermaat/gitlabhq,sideci-sample/sideci-sample-gitlabhq,delkyd/gitlabhq,mr-dxdy/gitlabhq,yuyue2013/ss,OtkurBiz/gitlabhq,luzhongyang/gitlabhq,fearenales/gitlabhq,yonglehou/gitlabhq,allysonbarros/gitlabhq,axilleas/gitlabhq,screenpages/gitlabhq,Telekom-PD/gitlabhq,eliasp/gitlabhq,mavimo/gitlabhq,NARKOZ/gitlabhq,mmkassem/gitlabhq,TheWatcher/gitlabhq,H3Chief/gitlabhq,ibiart/gitlabhq,cncodog/gitlab,daiyu/gitlab-zh,jaepyoung/gitlabhq,Exeia/gitlabhq,zBMNForks/gitlabhq,NKMR6194/gitlabhq,bigsurge/gitlabhq,Tyrael/gitlabhq,Telekom-PD/gitlabhq,mavimo/gitlabhq,Razer6/gitlabhq,larryli/gitlabhq,nguyen-tien-mulodo/gitlabhq,phinfonet/mobbr-gitlabhq,jaepyoung/gitlabhq,NuLL3rr0r/gitlabhq,mente/gitlabhq,larryli/gitlabhq,youprofit/gitlabhq,Kambda/mobbr-gitlabhq,fantasywind/gitlabhq,DanielZhangQingLong/gitlabhq,NARKOZ/gitlabhq,manfer/gitlabhq,yulchitaj/TEST3,julianengel/gitlabhq,koreamic/gitlabhq,wangcan2014/gitlabhq,123Haynes/gitlabhq,yonglehou/gitlabhq,salipro4ever/gitlabhq,sideci-sample/sideci-sample-gitlabhq,jvanbaarsen/gitlabhq,daiyu/gitlab-zh,yama07/gitlabhq,aaronsnyder/gitlabhq,zrbsprite/gitlabhq,vjustov/gitlabhq,htve/GitlabForChinese,youprofit/gitlabhq,stoplightio/gitlabhq,larryli/gitlabhq,mrb/gitlabhq,cncodog/gitlab,SVArago/gitlabhq,Soullivaneuh/gitlabhq,ikappas/gitlabhq,sekcheong/gitlabhq,pjknkda/gitlabhq,Datacom/gitlabhq,joalmeid/gitlabhq,sakishum/gitlabhq,theodi/gitlabhq,hzy001/gitlabhq,williamherry/gitlabhq,louahola/gitlabhq,atomaka/gitlabhq,mmkassem/gitlabhq,joalmeid/gitlabhq,folpindo/gitlabhq,TheWatcher/gitlabhq,hq804116393/gitlabhq,sekcheong/gitlabhq,fscherwi/gitlabhq,rhels/gitlabhq,since2014/gitlabhq,johnmyqin/gitlabhq,Exeia/gitlabhq,123Haynes/gitlabhq,yuyue2013/ss,manfer/gitlabhq,Exeia/gitlabhq,chenrui2014/gitlabhq,sue445/gitlabhq,icedwater/gitlabhq,cncodog/gitlab,NARKOZ/gitlabhq,sonalkr132/gitlabhq,allysonbarros/gitlabhq,mathstuf/gitlabhq,daiyu/gitlab-zh,Kambda/mobbr-gitlabhq,ngpestelos/gitlabhq,bigsurge/gitlabhq,bbodenmiller/gitlabhq,williamherry/gitlabhq,rumpelsepp/gitlabhq,initiummedia/gitlabhq,sonalkr132/gitlabhq,rebecamendez/gitlabhq,k4zzk/gitlabhq,luzhongyang/gitlabhq,screenpages/gitlabhq,tempbottle/gitlabhq,mavimo/gitlabhq,youprofit/gitlabhq,nguyen-tien-mulodo/gitlabhq,allistera/gitlabhq,htve/GitlabForChinese,DanielZhangQingLong/gitlabhq,Kambda/Mobbr,martinma4/gitlabhq,tk23/gitlabhq,duduribeiro/gitlabhq,yfaizal/gitlabhq,fgbreel/gitlabhq,since2014/gitlabhq,martinma4/gitlabhq,cui-liqiang/gitlab-ce,ayufan/gitlabhq,bigsurge/gitlabhq,yatish27/gitlabhq,nmav/gitlabhq,louahola/gitlabhq,szechyjs/gitlabhq,SkyWei/gitlabhq,kitech/gitlabhq,stellamiranda/mobbr-gitlabhq,yama07/gitlabhq,Telekom-PD/gitlabhq,WSDC-NITWarangal/gitlabhq,ibiart/gitlabhq,ksoichiro/gitlabhq,childbamboo/gitlabhq,fpgentil/gitlabhq,kitech/gitlabhq,openwide-java/gitlabhq,dreampet/gitlab,gopeter/gitlabhq,pjknkda/gitlabhq,Soullivaneuh/gitlabhq,ayufan/gitlabhq,initiummedia/gitlabhq,LytayTOUCH/gitlabhq,gorgee/gitlabhq,whluwit/gitlabhq,sekcheong/gitlabhq,yatish27/gitlabhq,pulkit21/gitlabhq,duduribeiro/gitlabhq,iiet/iiet-git,yatish27/gitlabhq,mrb/gitlabhq,hzy001/gitlabhq,yfaizal/gitlabhq,xuvw/gitlabhq,ZeoAlliance/gitlabhq,bbodenmiller/gitlabhq,hzy001/gitlabhq,lvfeng1130/gitlabhq,dwrensha/gitlabhq,OlegGirko/gitlab-ce,kitech/gitlabhq,Razer6/gitlabhq,hacsoc/gitlabhq,fantasywind/gitlabhq,vjustov/gitlabhq,H3Chief/gitlabhq,tempbottle/gitlabhq,jrjang/gitlab-ce,stoplightio/gitlabhq,flashbuckets/gitlabhq,johnmyqin/gitlabhq,gopeter/gitlabhq,dplarson/gitlabhq,WSDC-NITWarangal/gitlabhq,martijnvermaat/gitlabhq,123Haynes/gitlabhq,ngpestelos/gitlabhq,rebecamendez/gitlabhq,manfer/gitlabhq,dvrylc/gitlabhq,hacsoc/gitlabhq,michaKFromParis/sparkslab,cui-liqiang/gitlab-ce,stanhu/gitlabhq,szechyjs/gitlabhq,jvanbaarsen/gitlabhq,ordiychen/gitlabhq,ZeoAlliance/gitlabhq,per-garden/gitlabhq,liyakun/gitlabhq,dukex/gitlabhq,ferdinandrosario/gitlabhq,icedwater/gitlabhq,hacsoc/gitlabhq,per-garden/gitlabhq,jaepyoung/gitlabhq,8thcolor/testing-public-gitlabhq,it33/gitlabhq,louahola/gitlabhq,Devin001/gitlabhq,jrjang/gitlabhq,tk23/gitlabhq,jrjang/gitlabhq,revaret/gitlabhq,michaKFromParis/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,zrbsprite/gitlabhq,jvanbaarsen/gitlabhq,since2014/gitlabhq,pulkit21/gitlabhq,allistera/gitlabhq,MauriceMohlek/gitlabhq,aaronsnyder/gitlabhq,k4zzk/gitlabhq,openwide-java/gitlabhq,tim-hoff/gitlabhq,fantasywind/gitlabhq,Devin001/gitlabhq,iiet/iiet-git,folpindo/gitlabhq,julianengel/gitlabhq,pulkit21/gitlabhq,flashbuckets/gitlabhq,DanielZhangQingLong/gitlabhq,louahola/gitlabhq,openwide-java/gitlabhq,bbodenmiller/gitlabhq,pjknkda/gitlabhq,whluwit/gitlabhq,OtkurBiz/gitlabhq,LUMC/gitlabhq,folpindo/gitlabhq,nguyen-tien-mulodo/gitlabhq,vjustov/gitlabhq,revaret/gitlabhq,SVArago/gitlabhq,Datacom/gitlabhq,H3Chief/gitlabhq,revaret/gitlabhq