OpenStack builder: Make region not required
OpenStack builder: Make region not required

Perhaps "region" is required when using a public provider like
Rackspace? It's not required for my private cloud from Metacloud. I
suspect a lot of private clouds have only a single region and thus don't
need "region" to be specified.

jmptrader/packer,taliesins/packer,jmptrader/packer,trumant/packer,timsutton/packer,mwhooker/packer,higebu/packer,dave2/packer,Sheile/packer,dave2/packer,leroux/packer,manicai/packer,pieter-lazzaro/packer,ober/packer,grange74/packer,grange74/packer,ldejager/packer,mafrosis/packer,vtolstov/packer,pvandervelde/packer,pvandervelde/packer,dev-head/packer,oliviertremblay/packer,dayglojesus/packer,pvanbuijtene/packer,tb3088/packer,cyberhouse/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,mgk/packer,pearkes/packer,LinusU/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,bhcleek/packer,israelshirk/packer,burnzy/packer,jasonchaffee/packer,arizvisa/packer,dave2/packer,uber/packer,jae2/packer,dev-head/packer,KFishner/packer,KohlsTechnology/packer,oliviertremblay/packer,mayflower/packer,smaato/packer,mvanholsteijn/packer,kpettijohn/packer,kpettijohn/packer,zhuzhih2017/packer,dayglojesus/packer,mwhooker/packer,justincampbell/packer,feateds/packer,jsternberg/packer,KFishner/packer,dantran/packer,mvanholsteijn/packer,bhcleek/packer,mitchellh/packer,pvanbuijtene/packer,beni55/packer,paulmey/packer,jamesbishopp/packer,c22/packer,jszwedko/packer,ricardclau/packer,rnaveiras/packer,mitchellh/packer,DualSpark/packer,gildas/packer-hyperv,jsternberg/packer,leroux/packer,mkuzmin/packer,youhong316/packer,leroux/packer,jamesbishopp/packer,styro/packer,jimmythedog/packer,jean/packer,ephemeralsnow/packer,bensojona/packer,marklap/packer,cyberhouse/packer,masbog/packer,vtolstov/packer,rodm/packer,blairham/packer,aneeshusa/packer,timsutton/packer,boumenot/packer,jarl-dk/packer,Akasurde/packer,jamesleech/packer,jonathankarsh/packer,zhuzhih2017/packer,jonathankarsh/packer,KohlsTechnology/packer,Xiol/packer,ChrisLundquist/packer,pearkes/packer,jen20/packer,pearkes/packer,tracyde/packer,pecigonzalo/packer,jgkim/packer,mafrosis/packer,timsutton/packer,henrysher/packer,life360/packer,israelshirk/packer,dantran/packer,orivej/packer,rk295/packer,ChrisLundquist/packer,jszwedko/packer,jimmythedog/packer,bryson/packer,danschaffer/packer,rickard-von-essen/packer,sgirones/packer,AlphaStaxLLC/packer,yoctocloud/packer,blairham/packer,umang1912/packer,mohae/packer,higebu/packer,mohae/packer,Banno/packer,masbog/packer,israelshirk/packer,pvandervelde/packer,paulmey/packer,rodm/packer,bryson/packer,smaato/packer,Silver90/packer,mefellows/packer,sequenceiq/packer,smaato/packer,sean-/packer,sean-/packer,grubernaut/packer,c22/packer,manicai/packer,marc-ta/packer,mayflower/packer,shaunduncan/packer,orivej/packer,monsterzz/packer,dev-head/packer,sneal/packer,Cbeck527/packer,youhong316/packer,p1-nico/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,threatstream/packer,ephemeralsnow/packer,beni55/packer,monsterzz/packer,justincampbell/packer,jgkim/packer,sneal/packer,mindjiver/packer,pearkes/packer,mgk/packer,zhuzhih2017/packer,blairham/packer,pieter-lazzaro/packer,KFishner/packer,tas50/packer,routelastresort/packer,tsmolka/packer,israelshirk/packer,jarl-dk/packer,smaato/packer,Xiol/packer,ricardclau/packer,vtolstov/packer,mwhooker/packer,AlphaStaxLLC/packer,mefellows/packer,umang1912/packer,atlassian/packer,AlphaStaxLLC/packer,noplay/packer,grange74/packer,uber/packer,uber/packer,higebu/packer,taliesins/packer,tas50/packer,hasJackb/packer,mansunkuo/packer,jen20/packer,threatstream/packer,youhong316/packer,icnocop/packer,paulvollmer/packer,trumant/packer,grubernaut/packer,sansb/packer,jamesleech/packer,tas50/packer,stagrlee/packer,hazelesque/packer,orivej/packer,threatstream/packer,vtolstov/packer,arizvisa/packer,mayflower/packer,sequenceiq/packer,jarl-dk/packer,tsmolka/packer,c22/packer,gbarberi/packer,icnocop/packer,trumant/packer,masbog/packer,threatstream/packer,dave2/packer,danschaffer/packer,youhong316/packer,quantang/packer,hazelesque/packer,yoctocloud/packer,yonglehou/packer,jamesbishopp/packer,KohlsTechnology/packer,yoctocloud/packer,jimmythedog/packer,Cbeck527/packer,ephemeralsnow/packer,danschaffer/packer,sean-/packer,jae2/packer,Akasurde/packer,c22/packer,Silver90/packer,atlassian/packer,atlassian/packer,Silver90/packer,leroux/packer,yonglehou/packer,esemplare/packer,dayglojesus/packer,tomwilkie/packer,sequenceiq/packer,mansunkuo/packer,pvandervelde/packer,jsternberg/packer,life360/packer,mafrosis/packer,jamesleech/packer,noplay/packer,visioncritical/packer,routelastresort/packer,boumenot/packer,grange74/packer,danschaffer/packer,jasonchaffee/packer,napramirez/packer,hasJackb/packer,jmptrader/packer,napramirez/packer,mansunkuo/packer,tsmolka/packer,ttaylor249/packer,threatstream/packer,paulvollmer/packer,kgrvamsi/packer,marklap/packer,rodm/packer,stagrlee/packer,atlassian/packer,btd/packer,tracyde/packer,mkuzmin/packer,trumant/packer,mindjiver/packer,monsterzz/packer,Sheile/packer,rickard-von-essen/packer,routelastresort/packer,legal90/packer,ldejager/packer,stagrlee/packer,sneal/packer,mayflower/packer,paulmey/packer,rrva/packer,LinusU/packer,tsmolka/packer,zakuro9715/packer,btd/packer,mindjiver/packer,eranchetz/packer,taliesins/packer,arizvisa/packer,hashicorp/packer,dev-head/packer,yonglehou/packer,sobrinho/packer,rk295/packer,danschaffer/packer,Cbeck527/packer,monkeylittleinc/packer,timsutton/packer,dragon788/packer,rnaveiras/packer,marc-ta/packer,legal90/packer,aneeshusa/packer,p1-nico/packer,gildas/packer-hyperv,pieter-lazzaro/packer,LinusU/packer,marc-ta/packer,zakuro9715/packer,noplay/packer,monkeylittleinc/packer,shaunduncan/packer,jimmythedog/packer,stagrlee/packer,marklap/packer,oliviertremblay/packer,dragon788/packer,KohlsTechnology/packer,visioncritical/packer,zakuro9715/packer,dantran/packer,tomwilkie/packer,sobrinho/packer,gbarberi/packer,mitchellh/packer,markpeek/packer,dave2/packer,esemplare/packer,eranchetz/packer,BayanGroup/packer,cyberhouse/packer,gildas/packer-hyperv,fnoeding/packer,sansb/packer,jasonchaffee/packer,monkeylittleinc/packer,aneeshusa/packer,LinusU/packer,hazelesque/packer,Banno/packer,styro/packer,taliesins/packer,sgirones/packer,bensojona/packer,jamesbishopp/packer,styro/packer,hashicorp/packer,jae2/packer,grubernaut/packer,dieu/packer,dieu/packer,evertrue/packer,paulmey/packer,justincampbell/packer,higebu/packer,mkuzmin/packer,yoctocloud/packer,sean-/packer,markpeek/packer,legal90/packer,markpeek/packer,markpeek/packer,pecigonzalo/packer,BayanGroup/packer,ober/packer,tsmolka/packer,ober/packer,dantran/packer,jonathankarsh/packer,sneal/packer,tracyde/packer,beni55/packer,zeliff/packer,sgirones/packer,ChrisLundquist/packer,youhong316/packer,taliesins/packer,jen20/packer,shaunduncan/packer,Sheile/packer,KohlsTechnology/packer,zhuzhih2017/packer,paulmey/packer,jean/packer,esemplare/packer,mefellows/packer,p1-nico/packer,tsmolka/packer,hashicorp/packer,dragon788/packer,higebu/packer,hashicorp/packer,umang1912/packer,ober/packer,fnoeding/packer,mafrosis/packer,legal90/packer,jsternberg/packer,pvanbuijtene/packer,pieter-lazzaro/packer,styro/packer,yoctocloud/packer,Xiol/packer,rodm/packer,hazelesque/packer,ober/packer,fnoeding/packer,tb3088/packer,burnzy/packer,dieu/packer,dayglojesus/packer,grubernaut/packer,yonglehou/packer,ttaylor249/packer,ChrisLundquist/packer,rickard-von-essen/packer,masbog/packer,arizvisa/packer,ephemeralsnow/packer,sean-/packer,sobrinho/packer,Xiol/packer,bhcleek/packer,btd/packer,rnaveiras/packer,kgrvamsi/packer,gildas/packer-hyperv,bryson/packer,jen20/packer,tomwilkie/packer,ldejager/packer,ricardclau/packer,markpeek/packer,atlassian/packer,jasonchaffee/packer,mohae/packer,burnzy/packer,tas50/packer,samdunne/packer,bhcleek/packer,sean-/packer,grubernaut/packer,Banno/packer,avldya/packer,zhuzhih2017/packer,c22/packer,grange74/packer,zeliff/packer,sansb/packer,henrysher/packer,quantang/packer,ephemeralsnow/packer,ricardclau/packer,bensojona/packer,icnocop/packer,mkuzmin/packer,jszwedko/packer,tomwilkie/packer,timsutton/packer,boumenot/packer,mkuzmin/packer,jgkim/packer,tb3088/packer,timsutton/packer,DualSpark/packer,bryson/packer,tb3088/packer,jmptrader/packer,kpettijohn/packer,ttaylor249/packer,mwhooker/packer,jean/packer,boumenot/packer,Akasurde/packer,sequenceiq/packer,rk295/packer,eranchetz/packer,orivej/packer,evertrue/packer,jonathankarsh/packer,justincampbell/packer,ldejager/packer,jen20/packer,jarl-dk/packer,shaunduncan/packer,paulmey/packer,zakuro9715/packer,jszwedko/packer,arizvisa/packer,jen20/packer,uber/packer,rickard-von-essen/packer,sobrinho/packer,ttaylor249/packer,bensojona/packer,mindjiver/packer,ChrisLundquist/packer,life360/packer,evertrue/packer,mansunkuo/packer,legal90/packer,BayanGroup/packer,ChrisLundquist/packer,monkeylittleinc/packer,mgk/packer,pvandervelde/packer,ricardclau/packer,tb3088/packer,fnoeding/packer,Cbeck527/packer,youhong316/packer,feateds/packer,p1-nico/packer,mayflower/packer,dantran/packer,feateds/packer,zeliff/packer,smaato/packer,evertrue/packer,icnocop/packer,routelastresort/packer,lantrix/packer,zhuzhih2017/packer,feateds/packer,pecigonzalo/packer,rrva/packer,pvanbuijtene/packer,kgrvamsi/packer,henrysher/packer,esemplare/packer,visioncritical/packer,mwhooker/packer,Sheile/packer,rnaveiras/packer,monkeylittleinc/packer,eranchetz/packer,Akasurde/packer,bryson/packer,marklap/packer,Silver90/packer,lantrix/packer,p1-nico/packer,sneal/packer,burnzy/packer,mvanholsteijn/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,rnaveiras/packer,atlassian/packer,avldya/packer,esemplare/packer,dragon788/packer,routelastresort/packer,quantang/packer,avldya/packer,manicai/packer,tas50/packer,ttaylor249/packer,pieter-lazzaro/packer,c22/packer,samdunne/packer,vtolstov/packer,life360/packer,jamesleech/packer,mohae/packer,markpeek/packer,kpettijohn/packer,jae2/packer,DualSpark/packer,sansb/packer,arizvisa/packer,rk295/packer,napramirez/packer,napramirez/packer,Akasurde/packer,smaato/packer,rrva/packer,sgirones/packer,kgrvamsi/packer,KFishner/packer,mgk/packer,avldya/packer,quantang/packer,tb3088/packer,dayglojesus/packer,mansunkuo/packer,mefellows/packer,beni55/packer,icnocop/packer,gbarberi/packer,mohae/packer,aneeshusa/packe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