Comment 5 for bug 1579706

Reviewed: https://review.openstack.org/335648
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=ee4d69e28dfb3d4764186d0c0212d53c99bda3ca
Submitter: Jenkins
Branch: master

commit ee4d69e28dfb3d4764186d0c0212d53c99bda3ca
Author: EdLeafe <email address hidden>
Date: Wed Jun 29 18:51:34 2016 +0000

    Return HTTP 200 on list for invalid status

    The server listing API raises a 500 error if you pass an invalid status
    filter for admin user. In the case of a non-admin user, it simply
    returns an empty list. In the case of an admin user, it fetches extended
    server attributes, so a condition was added to get extended server
    attributes only when servers list is not empty.

    This change simply removes the cause of the 500 exception. A subsequent
    patch with a microversion bump will modify the behavior so that a 400
    Bad Request will be raised for an invalid status, for both admin and
    non-admin alike.

    Co-Authored-By: Dinesh Bhor <email address hidden>

    Closes-Bug: #1579706

    Change-Id: I10bde78f0a9ac59b8646d58f62fa5056f989f54f