gluster: Set additional fields in ServerServices

Modified the GlusterServicesReturnForXmlRpc to accept server id in
constructor, and populate it on the received GlusterServerService
object.

Also modified it to keep a static map of service name to id,
and use it to popuate service id and type in the received object.

Change-Id: I8e322abb58ffc5a4c9dccadd6345b68805921423
Signed-off-by: Shireesh Anjal <anjalshireesh@gmail.com>