create_domain should handle status asynchronously

[Ron Rickard]

The create_domain method in Pool Manager should use update_status to change the status of the domain instead of handling the status itself.

Also look and see if delete_domain should be handle the same way.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/145346

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/145346
Committed: https://git.openstack.org/cgit/openstack/designate/commit/?id=90ca9302f6881aef86827f65417a6bde1dfe0ef2
Submitter: Jenkins
Branch: master

commit 90ca9302f6881aef86827f65417a6bde1dfe0ef2
Author: rjrjr <email address hidden>
Date: Tue Jan 6 14:18:24 2015 -0700

    Domain Creation Includes Zone Transfer For Proper Status

    When a domain is created, the success or failure of the zone transfer needs
    to be considered not just the backend domain creation.

    - No longer calls update_status from the create_domain or the
      _periodic_create_domains_that_failed methods.
    - Ensure zones that do not transfer are marked as ERROR.
    - Some refactoring to remove redundant code.

    Change-Id: Idcf6ccba184b1a356045d2f963200e0b1fdb279c
    Closes-Bug: 1403267
    Closes-Bug: 1404377