Do not hardcode ironic svc port, protocol

The Ironic API server's port and protocol are hardcoded in various
places.  This updates the ironic bits to use configured values instead
and fixes a bug around iptables rule creationl.

Change-Id: I1ace68affff3afdbc0058be4d32f8044a24e9338
Closes-bug: #1393498
Merge "Do not hardcode ironic svc port, protocol"