Add bash completion for `docker service scale`
Add bash completion for `docker service scale`

Signed-off-by: Mike Goelzer <mike.goelzer@docker.com>

Conflicts:
	contrib/completion/bash/docker

sfsmithcha/docker,moby/moby,liaoqingwei/docker,SvenDowideit/docker,fcrisciani/docker,eskaaren/docker,madhanrm/docker,13W/docker,thaJeztah/docker,bearstech/moby,dccurtis/docker,wenchma/docker,xiaods/docker,POLJM242/docker,icaoweiwei/docker,ColinHebert/docker,shhsu/docker,endophage/docker,paralin/docker,rhatdan/storage,dsheets/moby,JMesser81/docker,amatsus/docker,erikstmartin/docker,alfred-landrum/docker,tagomoris/docker,mikebrow/docker,rhatdan/docker,icaoweiwei/docker,ajaymdesai/docker,jlhawn/docker,pramodhkp/moby,twaugh/docker,tophj-ibm/docker,SvenDowideit/docker,docker/docker,msabansal/docker,HideoYamauchi/docker,yosifkit/docker,qudongfang/docker,kunalkushwaha/docker,rhatdan/docker,Syntaxide/docker,harche/docker,noxiouz/docker,tkopczynski/docker,kunalkushwaha/docker,ibuildthecloud/docker,brahmaroutu/docker,JMesser81/docker,afein/docker,darrenstahlmsft/moby,ripcurld0/moby,tophj-ibm/moby,wenchma/docker,moul/docker,amatsus/docker,eskaaren/docker,gjaskiewicz/moby,portworx/docker,13W/docker,duglin/docker,konstruktoid/docker-1,gnailuy/docker,jvanz/docker,paralin/docker,qudongfang/docker,ibuildthecloud/docker,jlebon/docker,resin-io/docker,mahak/docker,zhuguihua/docker,bearstech/moby,dims/docker,srust/docker,fcrisciani/docker,raja-sami-10p/moby,alfred-landrum/docker,nawawi/docker,rancher/docker,darrenstahlmsft/moby,yp-engineering/docker,noironetworks/docker,docker/docker,yummypeng/docker,harche/docker,resin-io/docker,thtanaka/docker,gnailuy/docker,sterchelen/docker,KarthikNayak/docker,icaoweiwei/docker,moypray/docker,thaJeztah/docker,justincormack/docker,kojiromike/docker,trebonian/docker,x1022as/docker,rancher/docker,tkopczynski/docker,endophage/docker,kunalkushwaha/docker,diogomonica/docker,flavio/docker,johnstep/moby-moby,tagomoris/docker,13W/docker,erikstmartin/docker,mtesselH/docker,unclejack/docker,bluebreezecf/docker,twaugh/docker,tophj-ibm/docker,coolljt0725/docker,noironetworks/docker,13W/docker,whuwxl/docker,q384566678/docker,allencloud/docker,miminar/docker,allencloud/docker,tonistiigi/docker,imkin/moby,lixiaobing10051267/docker,PatrickLang/moby,cr7pt0gr4ph7/docker,darrenstahlmsft/docker,wenchma/docker,catinthesky/docker,dims/docker,sterchelen/docker,laijs/moby,darrenstahlmsft/docker,dccurtis/docker,rhatdan/docker,konstruktoid/docker-1,mtanlee/docker,coolljt0725/docker,dccurtis/docker,mtrmac/docker,eskaaren/docker,djs55/docker,splunk/docker,xuxinkun/docker,bonczj/moby-json-file-logger,brahmaroutu/docker,yongtang/docker,thaJeztah/docker,dperny/docker,sfsmithcha/docker,portworx/docker,rhatdan/storage,resin-io/docker,michelvocks/docker,yosifkit/docker,containers/storage,whuwxl/docker,paralin/docker,tophj-ibm/moby,jimjag/docker,dmcgowan/docker,estesp/docker,YuPengZTE/docker,unclejack/docker,gjaskiewicz/moby,jameszhan/docker,mikebrow/docker,kolyshkin/docker,YuPengZTE/docker,tklauser/docker,thtanaka/docker,nawawi/docker,darrenstahlmsft/docker,naveed-jamil-tenpearls/moby,unclejack/docker,q384566678/docker,xiekeyang/docker,trebonian/docker,alfred-landrum/docker,Ramzec/docker,pradipd/moby,zhuguihua/docker,srust/docker,jwhonce/docker,tagomoris/docker,HuKeping/docker,vdemeester/docker,dsheets/moby,brahmaroutu/docker,mkumatag/docker,moul/docker,vdemeester/docker,dgageot/docker,dongjoon-hyun/docker,lixiaobing1/docker,ffoysal/docker,sanjeo/docker,prertik/docker,jimjag/docker,ndeloof/docker,jlhawn/docker,maxamillion/docker,Morsicus/docker,darrenstahlmsft/moby,stevvooe/docker,moul/docker,nawawi/docker,erikh/docker,djs55/docker,dsheets/moby,noxiouz/docker,tklauser/docker,naveed-jamil-tenpearls/moby,haveatry/docker,ripcurld0/moby,msabansal/docker,dsau/docker,mike1729/docker,mikedougherty/docker,maxamillion/docker,moby/moby,mixja/docker,cloudflare/docker,projectatomic/docker,tianon/docker,projectatomic/docker,x1022as/docker,mahak/docker,hqhq/moby,sdurrheimer/docker,noxiouz/docker,cpuguy83/docker,johnstep/moby-moby,estesp/docker,akira-baruah/docker,sarnautov/moby,lixiaobing10051267/docker,HideoYamauchi/docker,abhinavdahiya/docker,ColinHebert/docker,laijs/docker,estesp/docker,kolyshkin/docker,gnailuy/docker,jameszhan/docker,mkumatag/docker,tophj-ibm/moby,cyphar/docker,nalind/docker,lixiaobing1/docker,sarnautov/moby,diogomonica/docker,flavio/docker,gjaskiewicz/moby,jlebon/docker,haveatry/docker,bonczj/moby-json-file-logger,imkin/moby,raja-sami-10p/moby,xiekeyang/docker,rremer/moby,Mokolea/docker,HuKeping/docker,danyalKhaliq10p/moby,gnailuy/docker,sdurrheimer/docker,dims/docker,konstruktoid/docker-upstream,POLJM242/docker,lixiaobing10051267/docker,nawawi/docker,sarnautov/moby,KingEmet/docker,tmp6154/docker,laijs/moby,scotttlin/docker,amatsus/docker,justyntemme/docker,haveatry/docker,xuxinkun/docker,ajaymdesai/docker,kojiromike/docker,liaoqingwei/docker,ajaymdesai/docker,xuxinkun/docker,kolyshkin/moby,abhinavdahiya/docker,mohmost12/docker,yosifkit/docker,bonczj/moby-json-file-logger,danyalKhaliq10p/moby,hypriot/docker,hqhq/moby,AkihiroSuda/docker,yasiramin10p/moby,laijs/docker,asbjornenge/docker,jvanz/docker,mikedougherty/docker,nalind/docker,crosbymichael/docker,gschaetz/moby,shhsu/docker,kojiromike/docker,michelvocks/docker,Ramzec/docker,dsau/docker,PatrickLang/moby,hypriot/docker,thtanaka/docker,JMesser81/docker,containers/storage,bluebreezecf/docker,moypray/docker,duglin/docker,mstanleyjones/docker,tmp6154/docker,kencochrane/docker,msabansal/docker,shishir-a412ed/docker,Mokolea/docker,paralin/docker,ColinHebert/docker,konstruktoid/docker-upstream,justincormack/docker,xiaods/docker,cpuguy83/docker,mike1729/docker,srust/docker,cpuguy83/docker,ibuildthecloud/docker,shishir-a412ed/docker,cloudflare/docker,catinthesky/docker,hypriot/docker,Mokolea/docker,whuwxl/docker,gschaetz/moby,ffoysal/docker,danyalKhaliq10p/moby,mkumatag/docker,sterchelen/docker,gschaetz/moby,mohmost12/docker,asbjornenge/docker,yummypeng/docker,konstruktoid/docker-upstream,asbjornenge/docker,coreos/docker,miminar/docker,erikh/docker,mtrmac/docker,flavio/docker,tonistiigi/docker,cr7pt0gr4ph7/docker,x1022as/docker,shishir-a412ed/docker,scotttlin/docker,michael-holzheu/docker,moypray/docker,bluebreezecf/docker,coreos/docker,cyphar/docker,cpuguy83/docker,vdemeester/docker,jlhawn/docker,ndeloof/docker,justyntemme/docker,yp-engineering/docker,thaJeztah/docker,dsau/docker,hqhq/moby,ibuildthecloud/docker,zhuguihua/docker,Syntaxide/docker,akira-baruah/docker,KingEmet/docker,Syntaxide/docker,cloudflare/docker,crosbymichael/docker,jimjag/docker,KingEmet/docker,dperny/docker,sfsmithcha/docker,stevvooe/docker,Ramzec/docker,jthelin/docker,dnephin/docker,abhinavdahiya/docker,miminar/docker,PatrickLang/moby,djs55/docker,mohmost12/docker,erikh/docker,kolyshkin/moby,michelvocks/docker,Ramzec/docker,mtesselH/docker,HuKeping/docker,laijs/docker,flavio/docker,kolyshkin/moby,duglin/docker,rancher/docker,mikedougherty/docker,tophj-ibm/docker,dmcgowan/docker,jvanz/docker,liaoqingwei/docker,nalind/docker,Morsicus/docker,nalind/docker,mixja/docker,mikebrow/docker,KarthikNayak/docker,dnephin/docker,mstanleyjones/docker,yummypeng/docker,allencloud/docker,ffoysal/docker,mtesselH/docker,lixiaobing1/docker,mixja/docker,scotttlin/docker,konstruktoid/docker-upstream,justyntemme/docker,twaugh/docker,splunk/docker,afein/docker,laijs/moby,pramodhkp/moby,jwhonce/docker,michael-holzheu/docker,charleszheng44/moby,sanjeo/docker,AkihiroSuda/docker,kencochrane/docker,mtanlee/docker,naveed-jamil-tenpearls/moby,portworx/docker,pradipd/moby,dgageot/docker,tkopczynski/docker,tonistiigi/docker,ibuildthecloud/docker,jlebon/docker,erikstmartin/docker,dongjoon-hyun/docker,jhorwit2/docker,rhatdan/storage,imkin/moby,raja-sami-10p/moby,madhanrm/docker,dperny/docker,xiekeyang/docker,moul/docker,mstanleyjones/docker,prertik/docker,Morsicus/docker,rremer/moby,charleszheng44/moby,bearstech/moby,q384566678/docker,fcrisciani/docker,pradipd/moby,mahak/docker,yosifkit/docker,YuPengZTE/docker,charleszheng44/moby,yp-engineering/docker,endophage/docker,jhorwit2/docker,jthelin/docker,SvenDowideit/docker,AkihiroSuda/docker,docker/docker,coolljt0725/docker,mtanlee/docker,tianon/docker,ndeloof/docker,qudongfang/docker,ripcurld0/moby,prertik/docker,mike1729/docker,cr7pt0gr4ph7/docker,projectatomic/docker,splunk/docker,stevvooe/docker,diogomonica/docker,tklauser/docker,tmp6154/docker,trebonian/docker,moby/moby,AkihiroSuda/docker,dongjoon-hyun/docker,cyphar/docker,catinthesky/docker,yongtang/docker,HideoYamauchi/docker,yongtang/docker,justincormack/docker,harche/docker,yasiramin10p/moby,KarthikNayak/docker,dmcgowan/docker,sanjeo/docker,dgageot/docker,jhorwit2/docker,jwhonce/docker,konstruktoid/docker-1,yasiramin10p/moby,Mokolea/docker,containers/storage,crosbymichael/docker,afein/docker,jimjag/docker,xiaods/docker,sdurrheimer/docker,pramodhkp/moby,shhsu/docker,kencochrane/docker,bearstech/moby,jameszhan/docker,noironetworks/docker,trebonian/docker,madhanrm/docker,maxamillion/docker,rremer/moby,moby/moby,mtrmac/docker,johnstep/moby-moby,dnephin/docker,13W/docker,coreos/docker,mahak/docker,michael-holzheu/docker