vdsmapi: gluster: vdsmapi schema definitions for existing gluster verbs

vdsmapi schema definitions for existing gluster vdsm verbs

Change-Id: I70d8c01176e8159e462d311b1241dbda0baf0bb2
Signed-off-by: Aravinda VK <avishwan@redhat.com>
Signed-off-by: ndarshan <dnarayan@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/18005
Reviewed-by: Bala.FA <barumuga@redhat.com>
Tested-by: Bala.FA <barumuga@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>