Add deployed-server backwards compatible template

In Newton, the ctlplane port on deployed-server was called
<hostname>-ctlplane-port. When this code was refactored in
I29fbc720c3d582cbb94385e65e4b64b101f7eac9, the -port suffix was dropped
in favor of <hostname>-<network> convention, and the port resource was
created directly in deployed-server.yaml instead of in a nested stack.

Both of those changes were backwards incompatible -- making it
impossible to upgrade to the new version of deployed-server.yaml without
the ctlplane port getting deleted/recreated, which causes a change in IP
address. The IP address change causes services to be misconfigured on
upgrade attempts.

Change-Id: I45991b60a151abf3c5e4d05a3aa7246b2d25ac5a