Do not consider cinder volumes as local disks

They belong to the VMs really, so don't add them to the fixed/unclaimed
disks list. Fixes bnc#826569
Merge pull request #172 from dirkmueller/release/roxy/master

Do not consider cinder volumes as local disks
Also add Support for Xen Virtual Disks (/dev/xvd*)
Merge pull request #178 from dirkmueller/release/roxy/master

Also add Support for Xen Virtual Disks (/dev/xvd*)
Drop executable bits on files
Merge pull request #179 from vuntz/no+x

Drop executable bits on files