Add builder to the required list of gems.
Add builder to the required list of gems.

aspiers/crowbar,rsalevsky/crowbar,tserong/crowbar,rhafer/crowbar,rsalevsky/crowbar,SUSE-Cloud/crowbar,aspiers/crowbar,toabctl/crowbar,SUSE-Cloud/crowbar,MaximilianMeister/crowbar,aplanas/crowbar,mmnelemane/crowbar,dirkmueller/crowbar,mmnelemane/crowbar,aplanas/crowbar,vwallfahrer/crowbar,tserong/crowbar,nkrinner/crowbar,MaximilianMeister/crowbar,rhafer/crowbar,crowbar/crowbar,dirkmueller/crowbar,rhafer/crowbar,toabctl/crowbar,nkrinner/crowbar,vwallfahrer/crowbar,crowbar/crowbar