AttributeError will be raise when list available zones

[Liusheng]

the available list api has been broken by AttributeError, the related log in nimble-engine.log is:

2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server [req-83f9c5f9-f5ec-46bd-bd9c-52a831fb6ee2 admin admin - - -] Exception during message handling
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/server.py", line 155, in _process_incoming
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server res = self.dispatcher.dispatch(message)
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 222, in dispatch
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server return self._do_dispatch(endpoint, method, ctxt, args)
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 192, in _do_dispatch
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server result = func(ctxt, **new_args)
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server File "/opt/stack/nimble/nimble/engine/manager.py", line 276, in list_availability_zones
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server az = node.properties.get('availability_zone')
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server AttributeError: 'unicode' object has no attribute 'properties'
2016-12-16 14:49:53.307 25193 ERROR oslo_messaging.rpc.server

[Liusheng (liusheng)]

https://review.openstack.org/#/c/411655/