Add the properties item in 'openstack image show' result
Add the properties item in 'openstack image show' result

After adding some metadatas to one image, all associated properties
should be displayed by the openstack image show command.

Change-Id: I56bcca7d7f4ba296e8cc36e4a22aeb5c7b78c2af

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals