quantum: Add missing root name for port

The "port" entity was missing the root name annotation, causing it not
to be deserialized correctly when performing operations requiring it's
deserialization (i.e. create port would fail).

Signed-off-by: Mike Kolesnik <mkolesni@redhat.com>
Merge pull request #37 from mkolesni/connectors

quantum: Add missing root name for port