Attribute resource_type_names is not always present in Metadata Defs

[Rob Cresswell]

The error message below is shown on loading the Metadata Definitions table in DevStack. The table shows the resource_type_names column, but this is not always present in each value,

The attribute resource_type_names does not exist on <Namespace: {'display_name': u'Common Image Properties', 'description': u'When adding an image to Glance, you may specify some common image properties that may prove useful to consumers of your image.', 'created_at': u'2015-02-10T16:01:06Z', 'namespace': u'OS::Glance::CommonImageProperties', 'visibility': u'private', 'protected': True}>.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/154974

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/154974
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=1e57a78da71ed4b264044fffa2603145142bb882
Submitter: Jenkins
Branch: master

commit 1e57a78da71ed4b264044fffa2603145142bb882
Author: Rob Cresswell <email address hidden>
Date: Wed Feb 11 17:35:30 2015 +0000

    Adds default for resource_type_names in metadata

    This patch makes the resource_type_names default safely to an empty
    dict, rather than being error handled by the table

    Change-Id: Ic327b646e2db44375aad129139b355a9be44f126
    Closes-Bug: 1420890