$ nosetests tests/unittests/test_datasource/test_azure.py
.........................E..............................
======================================================================
ERROR: test_list_possible_azure_ds_devs (tests.unittests.test_datasource.test_azure.TestAzureDataSource)
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Traceback (most recent call last):
  File "/home/ci-test/cloud-init/tests/unittests/test_datasource/test_azure.py", line 553, in test_list_possible_azure_ds_devs
    devlist.extend(dsaz.list_possible_azure_ds_devs())
  File "/home/ci-test/cloud-init/cloudinit/sources/DataSourceAzure.py", line 808, in list_possible_azure_ds_devs
    if util.is_FreeBSD():
  File "/home/ci-test/cloud-init/cloudinit/util.py", line 576, in is_FreeBSD
    return system_info()['variant'] == "freebsd"
  File "/home/ci-test/cloud-init/cloudinit/util.py", line 605, in system_info
    'dist': platform.dist(),  # pylint: disable=W1505
  File "/usr/lib64/python2.7/platform.py", line 363, in dist
    full_distribution_name=0)
  File "/usr/lib64/python2.7/platform.py", line 335, in linux_distribution
    _distname, _version, _id = _parse_release_file(firstline)
  File "/usr/lib64/python2.7/platform.py", line 273, in _parse_release_file
    m = _lsb_release_version.match(firstline)
TypeError: expected string or buffer

----------------------------------------------------------------------
Ran 56 tests in 0.374s

FAILED (errors=1)