Remove Neutron firewall resources id attributes

This patch removes the id attributes of the various firewall resources,
and fixes attribute description to use gettext and proper sentences.

Change-Id: I4ccbb86239cd904a1b8f7023abe92842762429f2
Partial-Bug: #1230228
Remove Port resource id attribute

This patch removes the id attribute of the Neutron Port resource, as
people should use Ref.

Change-Id: I7acf1564ff4c25c8cbac53cd58bf93195352b451
Partial-Bug: #1230228
Merge "Remove Neutron firewall resources id attributes"
Merge "Remove Port resource id attribute"