Can not update port without creation new one

How it affects MOS:
Current bug blocks update of the port with required MAC address.
This functionality is necessary for configuration Calico networking in Kubernetes Murano Application.
Without fix, port will be re-created with different MAC address and IP, what makes cluster dead.

Original description:

Neutron client allows to update property: allowed_address_pairs
http://developer.openstack.org/api-ref/networking/v2/?expanded=show-port-details-detail,update-port-detail

Right now it cause if I want to update this resource it's not possible to use mac address of the same port, because setting new property cause update replace.
This update supported from liberty, so we also need backport fix to mitaka and liberty.

Scenario:
 - create stack with follow template:

heat_template_version: 2015-04-30

parameters:

  network:
    type: string
    default: private

resources:

  port:
    type: OS::Neutron::Port
    properties:
      network: { get_param: network }

  vm:
    type: OS::Nova::Server
    properties:
      image: cirros-0.3.4-x86_64-uec
      flavor: m1.micro
      networks:
        - port: { get_resource: port }

- get port mac address via outputs or port-show command
- update template by adding follow properties:
.........
  port:
    type: OS::Neutron::Port
    properties:
      network: { get_param: network }
      allowed_address_pairs:
        - mac_address: port_mac_address
          ip_address: 192.168.0.0/16
.......

Expected result:
allowed_address_pairs will be applied to the same mac address as port has.

Current result:
new port with different mac address during Update replace be created and allowed_address_pairs will contains old mac address, mentioned early