server-get/update show wrong values about 'id' and 'update_at'
server-get/update show wrong values about 'id' and 'update_at'

While process 'designate server-get' and 'designate server-update',
the 'id' and 'update_at' values are wrong, they should be
interchanged.

Change-Id: Ibddf9cc9a018774ed229c0dfa81e705cd74704bc
Closes-Bug: #1777576

openstack/python-designateclient