Neutron L3 agent HA duplicate port

Issue

• We have duplicated router HA ports associated on some routers

  # neutron l3-agent-list-hosting-router <router id>
  +--------------------------------------+-------------+----------------+-------+----------+
  | id                                   | host        | admin_state_up | alive | ha_state |
  +--------------------------------------+-------------+----------------+-------+----------+
  | 04867f8c-5632-412a-8ce7-79bfccc2f620 | neutron-n-2 | True           | :-)   | active   |  ***
  | 8d24b6e8-fd63-4f84-93cd-9361ee5b9e4a | neutron-n-1 | True           | :-)   | standby  |
  | 04867f8c-5632-412a-8ce7-79bfccc2f620 | neutron-n-2 | True           | :-)   | active   |  ***
  | fb833e11-ce79-4287-bd6b-6ef5aeed5814 | neutron-n-0 | True           | :-)   | standby  |
  +--------------------------------------+-------------+----------------+-------+----------+