Creating metadef object without properties raises 500 error

[Kamil Rykowski]

When you try to create a metadef object without any properties associated with it you get an Internal Server Error 500:

glance md-object-create --name obj_name --schema '{"description": "some desc"}' OS::Software::DBMS

AttributeError: 'NoneType' object has no attribute 'iteritems'

The object itself is created successfully, but the notification is not fired.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/168873

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/168873
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=374d50a56e2c6883798ddb4391ba52eb004adddd
Submitter: Jenkins
Branch: master

commit 374d50a56e2c6883798ddb4391ba52eb004adddd
Author: Kamil Rykowski <email address hidden>
Date: Mon Mar 30 14:16:57 2015 +0200

    Creating metadef object without any properties

    Creating a metadef object without any properties associated with it
    raises an Internal Server Error. It is easily reproducible by running
    following glanceclient command:

    glance --os-image-api-version 2 md-object-create --name obj_name
    --schema '{"description": "some desc"}' OS::Software::DBMS

    The metadef object itself is created successfully, but the notification
    is not fired and the response has code 500. Proposed patch fixes it by
    making sure that notification system won't iterate over None value.

    Change-Id: I591801d80d9cb2738dc3d27d7719fcc53a3d0645
    Closes-Bug: 1438154