De-spaghettify some of the code in voume.rb by splitting it into
smaller functions.
It is make_loopback_volume, not make_local_volume.
Merge pull request #57 from VictorLowther/pull-req-release-mesa-1.6-master-372850d7ee40fa05f9fc6a185c0dcefe2331a08a

https://github.com/crowbar/barclamp-cinder/pull/57

Merged by devtool for ArkadyKanevsky