Add libguestfs-tools package to nova utilities

Include libguestfs-tools package as part of nova
utilities class and update spec tests. This
package provides library and tools for managing
virtual disks such as guestmount which are useful
for nova-compute.

Change-Id: Ie63b1417b5d9f584a23baa52f26efc3ff71b8785
Merge "Add libguestfs-tools package to nova utilities"
Adding manage_service parameter to all services

When set to false, enables puppet to configure a service without
starting/stopping it on each run.  This may be necessary when
using an external clustering system (Corosync/Pacemaker, for
example).  Defaults to true.

Change-Id: Iff21ee384fa857e1ddec0e15ca85df8aedad3e80