V3 servers core API missing decorator expected_errors

[Alex Xu]

Most of v3 servers core API missing decorator expected_errors.

All the v3 api should be under the protection of expected_errors

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/107885

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/107885
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=83b37aeb5da8af6e305098a7e698d058f431f332
Submitter: Jenkins
Branch: master

commit 83b37aeb5da8af6e305098a7e698d058f431f332
Author: He Jie Xu <email address hidden>
Date: Fri Jul 18 11:53:23 2014 +0800

    Add decorator expected_errors to V3 servers core

    All v3 api should use expected_errors to prevent unexpected exception
    raised. This patch add decorator expected_errors for v3 servers core.

    Change-Id: Ia1fa09d6cf68a65c85ac5fd2aff9b9202d76e7ca
    Closes-Bug: #1343778