GitLab

Add xenguest-manager to handle xenguest image based guests:
- create guest (use LVM to create disks for guests)
- start/stop guests
- provide init script to have guest auto started on boot
- add documentation

Change-Id: I5319ecb77f3aa9f8c1aff4891c05973288156f11
Issue-Id: SCM-767
Signed-off-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Diego Sueiro <diego.sueiro@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>