V2 API virtual interfaces does not catch InstanceNotFound exceptions

[Christopher Yeoh]

The V2 API virtual interfaces extension 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/68020

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/68020
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=d9b2c0127c11eb832f1c37e01977e04d4f9cb1ab
Submitter: Jenkins
Branch: master

commit d9b2c0127c11eb832f1c37e01977e04d4f9cb1ab
Author: Chris Yeoh <email address hidden>
Date: Tue Jan 21 14:58:40 2014 +1030

    Catch InstanceNotFound exceptions for V2 API virtual interfaces

    Use the common.get_instance method to get the instance object
    in the V2 API virtual interfaces extension rather than call
    the compute api directly. The utility function
    handes InstanceNotFound exceptions and tranlsates them to HTTPNotFound
    rather than letting them propagate up causing a traceback.

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

    Change-Id: I8abee22c53195926e3d2af1da9b14cd9d3608e63
    Closes-Bug: 1270804