Update main barclamp staging sequence to loop by stage then barclamp.
Update main barclamp staging sequence to loop by stage then barclamp.

This allows any custom build actions to be able to assume that all the
previous staging operations have succeeded.

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