container can't change hostname

[lvdongbing]

When I use novadocker as compute driver to boot sahara cluster, it failed as following erros:
2015-09-08 03:00:54.213 18473 DEBUG sahara.context [req-31b31f6b-2d67-4b74-9364-9f47ee4497c2 ] [instance: 3b78a56a-150b-4e42-a62c-e6cdcd5e39b7, cluster: 59609d21-8633-4225-9c85-d4047fb5995c] Thread configure-instance-cluster2-master-0 failed with exception: RemoteCommandException: Error during command execution: "sudo hostname cluster2-master-0.novalocal"
Return code: 1
STDERR:
sudo: unable to resolve host instance-0000001e
hostname: you must be root to change the host name

Error ID: ae1991c2-66e8-4c9f-a0e9-7fbb97b702ed
Error ID: 7c621a1b-ce72-4d06-89a7-178baab40fb9 _wrapper /opt/stack/sahara/sahara/context.py:172
2015-09-08 03:00:54.214 18473 DEBUG sahara.context [req-31b31f6b-2d67-4b74-9364-9f47ee4497c2 ] [instance: none, cluster: 59609d21-8633-4225-9c85-d4047fb5995c] Thread configure-instance-cluster2-worker-0 failed with exception: RemoteCommandException: Error during command execution: "sudo hostname cluster2-worker-0.novalocal"
Return code: 1
STDERR:
sudo: unable to resolve host instance-0000001d
hostname: you must be root to change the host name

I found that it's an issue related to novadocker, container created by novadocker didn't hava privileges to set hostname.
The code Docker client start container as below:
        def start(self, container, binds=None, port_bindings=None, lxc_conf=None,
              publish_all_ports=False, links=None, privileged=False, ...)
The parameter 'privileged' should be 'True', but novadocker didn't pass this para to Docker client when booting container.

[Davanum Srinivas (DIMS) (dims-v)]

Fixed in https://review.openstack.org/#/c/221585/