V2 API floating_ips addFloatingIP does not catch InstanceNotFound exception

[Christopher Yeoh]

The V2 API floating ip extension (addFloatingIp) does not catch InstanceNotFound exceptions which causes a traceback in the nova api log

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/68030

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/68030
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=78646dd3180eb9cf0c91fdb226b2eb8f16061d7b
Submitter: Jenkins
Branch: master

commit 78646dd3180eb9cf0c91fdb226b2eb8f16061d7b
Author: Chris Yeoh <email address hidden>
Date: Tue Jan 21 17:30:35 2014 +1030

    Catch InstanceNotFound exceptions for V2 API floating_ips

    Adds handling of InstanceNotFound exceptions in the V2 API
    floating_ips extension and translate them to HTTPNotFound rather
    than letting them propogate and causing a traceback in the logs

    Co-Authored-By: Michael Still <email address hidden>

    Change-Id: Idc1a5b2e6b8cb9778d032e5e1fc8112a65fc225c
    Closes-Bug: 1271047