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[CentOS 6 & 7: Build & Test] ERROR: test_list_possible_azure_ds_devs (tests.unittests.test_datasource.test_azure.TestAzureDataSource)
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[CentOS 6 & 7: Build & Test] Traceback (most recent call last):
[CentOS 6 & 7: Build & Test]   File "/home/ci-test/cloud-init/tests/unittests/test_datasource/test_azure.py", line 553, in test_list_possible_azure_ds_devs
[CentOS 6 & 7: Build & Test]     devlist.extend(dsaz.list_possible_azure_ds_devs())
[CentOS 6 & 7: Build & Test]   File "/home/ci-test/cloud-init/cloudinit/sources/DataSourceAzure.py", line 808, in list_possible_azure_ds_devs
[CentOS 6 & 7: Build & Test]     if util.is_FreeBSD():
[CentOS 6 & 7: Build & Test]   File "/home/ci-test/cloud-init/cloudinit/util.py", line 576, in is_FreeBSD
[CentOS 6 & 7: Build & Test]     return system_info()['platform'].startswith('FreeBSD')
[CentOS 6 & 7: Build & Test]   File "/home/ci-test/cloud-init/cloudinit/util.py", line 604, in system_info
[CentOS 6 & 7: Build & Test]     'dist': platform.linux_distribution(),  # pylint: disable=W1505
[CentOS 6 & 7: Build & Test]   File "/usr/lib64/python2.7/platform.py", line 335, in linux_distribution
[CentOS 6 & 7: Build & Test]     _distname, _version, _id = _parse_release_file(firstline)
[CentOS 6 & 7: Build & Test]   File "/usr/lib64/python2.7/platform.py", line 273, in _parse_release_file
[CentOS 6 & 7: Build & Test]     m = _lsb_release_version.match(firstline)
[CentOS 6 & 7: Build & Test] TypeError: expected string or buffer
[CentOS 6 & 7: Build & Test] 
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