Do not use keystone's config for nova's port

Keystone's configuration should have no bearing on the catalog
for nova's port. Nova's port is "static" data from the templated
catalog perspective.

The 'compute_port' option has been marked as deprecated and
slated for removal in the L release. The default/sample
templated catalog files do not rely on this option any
longer.

Change-Id: I51b0ec951449360f002c2e7c900ded0f40e16044
Closes-Bug: #1335278
Merge "Do not use keystone's config for nova's port"