Get on an abandon zone should return 405 and not a 404

[Vinod Mangalpally]

Steps to Reproduce:
================
Do a get on v2/zones/<zone_id>/tasks/abandon

Expected behavior:
===============
This should return a 405 as only a POST is a valid operation at v2/zones/<zone_id>/tasks/abandon

Actual behavior:
=============
A 404 with the message "resource not found" is returned.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/155627

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/155627
Committed: https://git.openstack.org/cgit/openstack/designate/commit/?id=c4666a8cca42fd067e9c86933206cc13f71bdb19
Submitter: Jenkins
Branch: master

commit c4666a8cca42fd067e9c86933206cc13f71bdb19
Author: Vinod Mangalpally <email address hidden>
Date: Tue Feb 17 10:42:36 2015 -0600

    Get on an abandon zone returns 405

    Only a POST is valid on an abandon zone endpoint
    (v2/zones/<zone_id>/tasks/abandon). All the other
    operations including a get return 405

    Change-Id: I0a812ad96b3c0da133dc506d2c4df7557bc3d5fd
    Closes-Bug: 1421416