Comment 8 for bug 920782

the issue comes back, i encounter it on ubuntu 12.10 with the latest master branch ce4e43fe6fcba0e85d143363ef6d9e4d4719b051
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22:27:42 ERROR: test suite for <module 'tempest.tests.compute' from '/opt/stack/tempest/tempest/tests/compute/__init__.py'>
22:27:42 ----------------------------------------------------------------------
22:27:42 Traceback (most recent call last):
22:27:42 File "/usr/lib/python2.7/dist-packages/nose/suite.py", line 208, in run
22:27:42 self.setUp()
22:27:42 File "/usr/lib/python2.7/dist-packages/nose/suite.py", line 291, in setUp
22:27:42 self.setupContext(ancestor)
22:27:42 File "/usr/lib/python2.7/dist-packages/nose/suite.py", line 314, in setupContext
22:27:42 try_run(context, names)
22:27:42 File "/usr/lib/python2.7/dist-packages/nose/util.py", line 478, in try_run
22:27:42 return func()
22:27:42 File "/opt/stack/tempest/tempest/tests/compute/__init__.py", line 49, in setup_package
22:27:42 extensions_client.is_enabled('DiskConfig'))
22:27:42 File "/opt/stack/tempest/tempest/services/compute/json/extensions_client.py", line 37, in is_enabled
22:27:42 _, extensions = self.list_extensions()
22:27:42 File "/opt/stack/tempest/tempest/services/compute/json/extensions_client.py", line 32, in list_extensions
22:27:42 resp, body = self.get(url)
22:27:42 File "/opt/stack/tempest/tempest/common/rest_client.py", line 173, in get
22:27:42 return self.request('GET', url, headers, wait=wait)
22:27:42 File "/opt/stack/tempest/tempest/common/rest_client.py", line 201, in request
22:27:42 self._set_auth()
22:27:42 File "/opt/stack/tempest/tempest/common/rest_client.py", line 73, in _set_auth
22:27:42 self.tenant_name)
22:27:42 TypeError: 'NoneType' object is not iterable