Allow barclamps to be added to steup to restrict what is available in the env.
Allow barclamps to be added to steup to restrict what is available in the env.

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