api failures don't show error details

[Robert Collins]

The 500 error here is a symptom - it should have had an explanatory details from the server, but its not shown.

2014-08-14 09:43:36.808 | + init-keystone -o 192.0.2.3 -t .. -e <email address hidden> -p ... -u heat-admin
2014-08-14 09:43:37.254 | Traceback (most recent call last):
2014-08-14 09:43:37.294 | File "/opt/stack/new//tripleo-incubator/scripts/init-keystone", line 11, in <module>
2014-08-14 09:43:37.295 | sys.exit(main())
2014-08-14 09:43:37.295 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/os_cloud_config/cmd/init_keystone.py", line 66, in main
2014-08-14 09:43:37.295 | args.user)
2014-08-14 09:43:37.295 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/os_cloud_config/keystone.py", line 42, in initialize
2014-08-14 09:43:37.296 | _create_roles(keystone)
2014-08-14 09:43:37.296 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/os_cloud_config/keystone.py", line 107, in _create_roles
2014-08-14 09:43:37.296 | keystone.roles.create('admin')
2014-08-14 09:43:37.297 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/keystoneclient/v2_0/roles.py", line 39, in create
2014-08-14 09:43:37.335 | return self._create('/OS-KSADM/roles', params, "role")
2014-08-14 09:43:37.335 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/keystoneclient/base.py", line 150, in _create
2014-08-14 09:43:37.336 | return self._post(url, body, response_key, return_raw, **kwargs)
2014-08-14 09:43:37.336 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/keystoneclient/base.py", line 164, in _post
2014-08-14 09:43:37.336 | resp, body = self.client.post(url, body=body, **kwargs)
2014-08-14 09:43:37.337 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/keystoneclient/httpclient.py", line 617, in post
2014-08-14 09:43:37.337 | return self._cs_request(url, 'POST', **kwargs)
2014-08-14 09:43:37.337 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/keystoneclient/httpclient.py", line 603, in _cs_request
2014-08-14 09:43:37.338 | return self.request(url, method, **kwargs)
2014-08-14 09:43:37.338 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/keystoneclient/httpclient.py", line 578, in request
2014-08-14 09:43:37.338 | resp = super(HTTPClient, self).request(url, method, **kwargs)
2014-08-14 09:43:37.338 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/keystoneclient/baseclient.py", line 21, in request
2014-08-14 09:43:37.340 | return self.session.request(url, method, **kwargs)
2014-08-14 09:43:37.340 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/keystoneclient/utils.py", line 318, in inner
2014-08-14 09:43:37.341 | return func(*args, **kwargs)
2014-08-14 09:43:37.341 | File "/opt/stack/new/tripleo-incubator/openstack-tools/local/lib/python2.7/site-packages/keystoneclient/session.py", line 339, in request
2014-08-14 09:43:37.341 | raise exceptions.from_response(resp, method, url)
2014-08-14 09:43:37.342 | keystoneclient.openstack.common.apiclient.exceptions.InternalServerError: An unexpected error prevented the server from fulfilling your request. (HTTP 500)