Add CLI getters and setters for new VM fields.
Add CLI getters and setters for new VM fields.

Make CLI getters and setters for the VM fields order, start_delay,
shutdown_delay and appliance.

Signed-off-by: John Else <37b74501daa612e48fea94f9846ed4ddeb6a8f07@citrix.com>

koushikcgit/xcp-rrdd,djs55/xcp-networkd,simonjbeaumont/xcp-rrdd,koushikcgit/xcp-rrdd,djs55/xcp-networkd,johnelse/xcp-rrdd,johnelse/xcp-rrdd,sharady/xcp-networkd,sharady/xcp-networkd,simonjbeaumont/xcp-rrdd,koushikcgit/xcp-rrdd,djs55/squeezed,robhoes/squeezed,djs55/xcp-rrdd,koushikcgit/xcp-networkd,djs55/xcp-rrdd,koushikcgit/xcp-networkd