Failure of REST API call to disassociate a FIP which is not associated with any port

[Onong Tayeng]

Create a FIP but do not associate with any VM port.

Execute the REST API to disassociate the FIP with a null port_id param:

curl -s http://A.B.C.D:9696/v2.0/floatingips/2a6a1340-cd74-4fd0-9538-a864bd39beb4 -X PUT -H "Content-Type: application/json" -H "Accept: application/json" -H "X-Auth-Token: $OS_CREDS" -d '
{
    "floatingip": {
        "port_id": null
    }
}'

and it fails with:

{
    "NeutronError": {
        "detail": "",
        "message": "Port None could not be found.",
        "type": "PortNotFound"
    }
}

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/569394

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/569394
Committed: https://git.openstack.org/cgit/openstack/networking-vpp/commit/?id=507570943f01af6cb215493e4fa9ab099e6b0c78
Submitter: Zuul
Branch: master

commit 507570943f01af6cb215493e4fa9ab099e6b0c78
Author: Onong Tayeng <email address hidden>
Date: Fri May 18 17:07:06 2018 +0530

    Issue with FIP disassociation handling

    The REST API call to disassociate a FIP, which is not associated
    with any port, fails with the PortNotFound error.

    Change-Id: Ic702c08f6833a9836c7d638e4116b0717be5ab41
    Closes-Bug: #1771992