Remove "tags" listed in Create port POST api-ref
Remove "tags" listed in Create port POST api-ref

Attribute 'tags' is not allowed in POST. This patch fixes the issue in
Create port POST api-ref where "tags" is listed. No other resource
api-ref is impacted.

Closes-bug: #1815600
Change-Id: I77232b9eadf628805e162c66f270548a38725078

openstack/neutron-lib,openstack/neutron-lib,openstack/neutron-lib,openstack/neutron-lib