Libvirt: Support for attaching volumes via SMB

Currently, there are Libvirt volume drivers that support
network-attached file systems such as Gluster of NFS. The purpose
of this blueprint is adding support for attaching volumes hosted
on a SMB share.

bp libvirt-smbfs-volume-support

Change-Id: I7b4b5ddad69d6e00a76f8754fff6c295ad787c08
Merge "Libvirt: Support for attaching volumes via SMB"