barclamp_install: Code simplification
barclamp_install: Code simplification

The loop over each barclamp is only used to do the migration now, so
remove all the extra noise.

crowbar/crowbar,toabctl/crowbar,aplanas/crowbar,aplanas/crowbar,dirkmueller/crowbar,crowbar/crowbar,rsalevsky/crowbar,toabctl/crowbar,SUSE-Cloud/crowbar,SUSE-Cloud/crowbar,dirkmueller/crowbar,rsalevsky/crowbar