Add image name tests around hostnames
Add image name tests around hostnames

Signed-off-by: Stephen J Day <63efd86fa22882ae89b6027b22a36e4db1f4214d@docker.com>

sergeyfd/distribution,schu/distribution,konstruktoid/distribution,sanscontext/docker.github.io,huamai-io/distribution,JimGalasyn/docker.github.io,spacexnice/distribution,sallyom/distribution,denverdino/distribution,shyr/distribution,jonboulle/distribution,liubin/distribution,aybabtme/distribution,docker/docker.github.io,aduermael/docker.github.io,beni55/distribution,imranraja85/distribution,docker-zh/docker.github.io,bdwill/docker.github.io,anweiss/docker.github.io,RaviTezu/distribution,linearregression/distribution,tian-xiaobo/distribution,jordimassaguerpla/distribution,troy0820/docker.github.io,ChenLingPeng/distribution,deis/distribution,estesp/distribution,deis/distribution,paulczar/distribution,lcarstensen/distribution,arvindkandhare/distribution,djenriquez/distribution,atyenoria/distribution,menglingwei/denverdino.github.io,BrianBland/distribution,docker/distribution,genedock/distribution,konstruktoid/distribution,anweiss/docker.github.io,endophage/distribution,sthapaun/distribution,denverdino/docker.github.io,rochacon/distribution,duglin/distribution,tt/distribution,pdevine/distribution,shin-/docker.github.io,manoj535/distribution,zhaytee/distribution,cezarsa/distribution,djenriquez/distribution,thelinuxkid/distribution,humble00/distribution,aduermael/docker.github.io,docker/distribution,sanscontext/docker.github.io,BSWANG/denverdino.github.io,konnase/distribution,zerosign/distribution,dobril-stanga/distribution,denverdino/denverdino.github.io,rhoml/distribution,rodacom/docker-hub,phiroict/docker,rillig/docker.github.io,bdwill/docker.github.io,arvindkandhare/distribution,thaJeztah/docker.github.io,sebrandon1/distribution,thaJeztah/docker.github.io,shubheksha/docker.github.io,gdevillele/docker.github.io,rbarlow/distribution,hopkings2008/distribution,sanscontext/docker.github.io,jzwlqx/denverdino.github.io,BSWANG/denverdino.github.io,anweiss/docker.github.io,joaofnfernandes/docker.github.io,hopkings2008/distribution,shin-/docker.github.io,denverdino/denverdino.github.io,danix800/docker.github.io,moxiegirl/distribution,alexisbellido/docker.github.io,moxiegirl/distribution,calavera/distribution,jzwlqx/denverdino.github.io,gavioto/distribution,iskradelta/distribution,denverdino/distribution-stevvooe,nwt/distribution,RichardScothern/distribution,harrisonfeng/distribution,jmitchell/distribution,jlhawn/distribution,avinson/distribution,shubheksha/docker.github.io,docker-zh/docker.github.io,docker-zh/docker.github.io,rbarlow/distribution,andrewnguyen/distribution,iskradelta/distribution,denverdino/docker.github.io,shubheksha/docker.github.io,jackpgriffin/distribution,cezarsa/distribution,stevvooe/distribution,yeghishe/distribution,rillig/docker.github.io,yuwaMSFT2/distribution,aduermael/docker.github.io,bxy09/distribution,danix800/docker.github.io,CodeJuan/distribution,sergeyfd/distribution,nateww/distribution,BradleyA/distribution,13W/distribution,Tiesheng/distribution,bpradipt/distribution,menglingwei/denverdino.github.io,londoncalling/docker.github.io,duglin/distribution,joeuo/docker.github.io,joeuo/docker.github.io,phiroict/docker,RyanDeng/distribution,rhoml/distribution,jrjang/distribution,BSWANG/denverdino.github.io,mattrgreen/distribution,adambrett-forks/distribution,kmala/distribution,schu/distribution,johnstep/docker.github.io,londoncalling/docker.github.io,joeuo/docker.github.io,denverdino/docker.github.io,mattrgreen/distribution,tian-xiaobo/distribution,nwt/distribution,dave-tucker/distribution,johnstep/docker.github.io,phiroict/docker,lindenlab/distribution,tschoots/distribution,docker/docker.github.io,RichardScothern/distribution,higebu/distribution,n1tr0g/distribution,beni55/distribution,aybabtme/distribution,thaJeztah/docker.github.io,avinson/distribution,rillig/docker.github.io,phiroict/docker,shyr/distribution,BradleyA/distribution,shin-/docker.github.io,denverdino/denverdino.github.io,kmala/distribution,gavioto/distribution,higebu/distribution,thaJeztah/docker.github.io,mikebrow/distribution,joaofnfernandes/docker.github.io,thelinuxkid/distribution,liubin/distribution,aaronlehmann/distribution,runcom/distribution,tt/distribution,sadlil/distribution,spacexnice/distribution,alexisbellido/docker.github.io,JimGalasyn/docker.github.io,runcom/distribution,alexisbellido/docker.github.io,bsmr-docker/distribution,atyenoria/distribution,jrjang/distribution,Seb-Solon/distribution,mbentley/distribution,danix800/docker.github.io,jzwlqx/distribution,JimGalasyn/docker.github.io,n1tr0g/distribution,baloo/distribution,genedock/distribution,harche/distribution,denverdino/docker.github.io,armbuilds/distribution,AoJ/distribution,humble00/distribution,menglingwei/denverdino.github.io,bxy09/distribution,lcarstensen/distribution,arneluehrs/distribution,bigsurge/distribution,LouisKottmann/distribution,LuisBosquez/docker.github.io,miminar/distribution,sanscontext/docker.github.io,rodacom/docker-hub,bigsurge/distribution,jlhawn/distribution,gdevillele/docker.github.io,adambrett-forks/distribution,nevermosby/distribution,RaviTezu/distribution,LuisBosquez/docker.github.io,imranraja85/distribution,mikebrow/distribution,jramseye/distribution,jhicks-camgian/distribution,aprajshekhar/distribution,JimGalasyn/docker.github.io,londoncalling/docker.github.io,linearregression/distribution,LuisBosquez/docker.github.io,shubheksha/docker.github.io,gdevillele/docker.github.io,Tiesheng/distribution,shin-/docker.github.io,johnstep/docker.github.io,nevermosby/distribution,jmitchell/distribution,noxiouz/distribution,anweiss/docker.github.io,sanscontext/docker.github.io,Seb-Solon/distribution,yeghishe/distribution,danix800/docker.github.io,docker/docker.github.io,jordimassaguerpla/distribution,jzwlqx/denverdino.github.io,RyanDeng/distribution,amitshukla/distribution,lorieri/distribution,zhaytee/distribution,JimGalasyn/docker.github.io,jramseye/distribution,thaJeztah/distribution,jonboulle/distribution,manoj535/distribution,tdooner/distribution,lindenlab/distribution,gdevillele/docker.github.io,BrickXu/distribution,wangmingshuai/distribution,sthapaun/distribution,thaJeztah/distribution,jackpgriffin/distribution,BSWANG/denverdino.github.io,bdwill/docker.github.io,13W/distribution,menglingwei/denverdino.github.io,vdemeester/distribution,shin-/docker.github.io,joeuo/docker.github.io,CodeJuan/distribution,arneluehrs/distribution,zerosign/distribution,estesp/distribution,calavera/distribution,BrianBland/distribution,pdevine/distribution,jzwlqx/denverdino.github.io,nateww/distribution,denverdino/distribution,aprajshekhar/distribution,BSWANG/denverdino.github.io,LuisBosquez/docker.github.io,aduermael/docker.github.io,sallyom/distribution,londoncalling/docker.github.io,lorieri/distribution,gdevillele/docker.github.io,andrewnguyen/distribution,baloo/distribution,amitshukla/distribution,LuisBosquez/docker.github.io,joeuo/docker.github.io,mattmoor/distribution,troy0820/docker.github.io,denverdino/denverdino.github.io,ChenLingPeng/distribution,joaofnfernandes/docker.github.io,anweiss/docker.github.io,alexisbellido/docker.github.io,mbentley/distribution,jzwlqx/denverdino.github.io,shubheksha/docker.github.io,johnstep/docker.github.io,dave-tucker/distribution,dmcgowan/distribution,bdwill/docker.github.io,aaronlehmann/distribution,jwhonce/distribution,huamai-io/distribution,bpradipt/distribution,endophage/distribution,dobril-stanga/distribution,cyli/distribution,menglingwei/denverdino.github.io,rillig/docker.github.io,jzwlqx/distribution,joaofnfernandes/docker.github.io,miminar/distribution,denverdino/docker.github.io,cyli/distribution,denverdino/denverdino.github.io,xiekeyang/distribution,harrisonfeng/distribution,noxiouz/distribution,troy0820/docker.github.io,tdooner/distribution,stevvooe/distribution,sadlil/distribution,armbuilds/distribution,denverdino/distribution-stevvooe,vdemeester/distribution,rochacon/distribution,championv/distribution,AoJ/distribution,bsmr-docker/distribution,johnstep/docker.github.io,harche/distribution,konnase/distribution,codefresh-io/cf-distribution,dmcgowan/distribution,paulczar/distribution,docker-zh/docker.github.io,wangmingshuai/distribution,sebrandon1/distribution,alexisbellido/docker.github.io,docker-zh/docker.github.io,tschoots/distribution,docker/docker.github.io,joaofnfernandes/docker.github.io,troy0820/docker.github.io,xiekeyang/distribution,thaJeztah/docker.github.io,bdwill/docker.github.io,docker/docker.github.io,BrickXu/distribution,codefresh-io/cf-distribution,londoncalling/docker.github.io,yuwaMSFT2/distribution,phiroict/docker,mattmoor/distribution,LouisKottmann/distribution,jhicks-camgian/distribution,jwhonce/distribution,championv/distribution