Functional test test_sync_standard_traits intermittently fails

http://logs.openstack.org/98/471498/1/check/gate-nova-tox-functional-ubuntu-xenial/c84dfef/console.html#_2017-06-06_22_23_07_594859

2017-06-06 22:23:07.594859 | nova.tests.functional.db.test_resource_provider.ResourceProviderTraitTestCase.test_sync_standard_traits
2017-06-06 22:23:07.594888 | -------------------------------------------------------------------------------------------------------
2017-06-06 22:23:07.594894 |
2017-06-06 22:23:07.594904 | Captured traceback:
2017-06-06 22:23:07.594917 | ~~~~~~~~~~~~~~~~~~~
2017-06-06 22:23:07.594934 | Traceback (most recent call last):
2017-06-06 22:23:07.594965 | File "nova/tests/functional/db/test_resource_provider.py", line 1768, in test_sync_standard_traits
2017-06-06 22:23:07.594988 | self.assertEqual(set(std_traits), set(all_traits))
2017-06-06 22:23:07.595032 | File "/home/jenkins/workspace/gate-nova-tox-functional-ubuntu-xenial/.tox/functional/local/lib/python2.7/site-packages/testtools/testcase.py", line 411, in assertEqual
2017-06-06 22:23:07.595053 | self.assertThat(observed, matcher, message)
2017-06-06 22:23:07.595095 | File "/home/jenkins/workspace/gate-nova-tox-functional-ubuntu-xenial/.tox/functional/local/lib/python2.7/site-packages/testtools/testcase.py", line 498, in assertThat
2017-06-06 22:23:07.595107 | raise mismatch_error
2017-06-06 22:23:07.595122 | testtools.matchers._impl.MismatchError: !=:
2017-06-06 22:23:07.595136 | reference = set(['HW_CPU_X86_3DNOW',
2017-06-06 22:23:07.595147 | 'HW_CPU_X86_ABM',
2017-06-06 22:23:07.595158 | 'HW_CPU_X86_AESNI',
2017-06-06 22:23:07.595169 | 'HW_CPU_X86_ASF',
2017-06-06 22:23:07.595198 | 'HW_CPU_X86_AVX',
2017-06-06 22:23:07.595211 | 'HW_CPU_X86_AVX2',
2017-06-06 22:23:07.595223 | 'HW_CPU_X86_AVX512BW',
2017-06-06 22:23:07.595234 | 'HW_CPU_X86_AVX512CD',
2017-06-06 22:23:07.595250 | 'HW_CPU_X86_AVX512DQ',
2017-06-06 22:23:07.595262 | 'HW_CPU_X86_AVX512ER',
2017-06-06 22:23:07.595274 | 'HW_CPU_X86_AVX512F',
2017-06-06 22:23:07.595286 | 'HW_CPU_X86_AVX512PF',
2017-06-06 22:23:07.595297 | 'HW_CPU_X86_AVX512VL',
2017-06-06 22:23:07.595308 | 'HW_CPU_X86_BMI',
2017-06-06 22:23:07.595319 | 'HW_CPU_X86_BMI2',
2017-06-06 22:23:07.595331 | 'HW_CPU_X86_CLMUL',
2017-06-06 22:23:07.595342 | 'HW_CPU_X86_F16C',
2017-06-06 22:23:07.595353 | 'HW_CPU_X86_FMA3',
2017-06-06 22:23:07.595364 | 'HW_CPU_X86_FMA4',
2017-06-06 22:23:07.595375 | 'HW_CPU_X86_MMX',
2017-06-06 22:23:07.595385 | 'HW_CPU_X86_MPX',
2017-06-06 22:23:07.595416 | 'HW_CPU_X86_SGX',
2017-06-06 22:23:07.595430 | 'HW_CPU_X86_SHA',
2017-06-06 22:23:07.595441 | 'HW_CPU_X86_SSE',
2017-06-06 22:23:07.595458 | 'HW_CPU_X86_SSE2',
2017-06-06 22:23:07.595469 | 'HW_CPU_X86_SSE3',
2017-06-06 22:23:07.595482 | 'HW_CPU_X86_SSE41',
2017-06-06 22:23:07.595494 | 'HW_CPU_X86_SSE42',
2017-06-06 22:23:07.595505 | 'HW_CPU_X86_SSE4A',
2017-06-06 22:23:07.595516 | 'HW_CPU_X86_SSSE3',
2017-06-06 22:23:07.595532 | 'HW_CPU_X86_SVM',
2017-06-06 22:23:07.595544 | 'HW_CPU_X86_TBM',
2017-06-06 22:23:07.595555 | 'HW_CPU_X86_TSX',
2017-06-06 22:23:07.595566 | 'HW_CPU_X86_VMX',
2017-06-06 22:23:07.595576 | 'HW_CPU_X86_XOP',
2017-06-06 22:23:07.595588 | 'HW_NIC_ACCEL_DEFLATE',
2017-06-06 22:23:07.595600 | 'HW_NIC_ACCEL_DIFFIEH',
2017-06-06 22:23:07.595612 | 'HW_NIC_ACCEL_ECC',
2017-06-06 22:23:07.595623 | 'HW_NIC_ACCEL_IPSEC',
2017-06-06 22:23:07.595634 | 'HW_NIC_ACCEL_LZS',
2017-06-06 22:23:07.595646 | 'HW_NIC_ACCEL_RSA',
2017-06-06 22:23:07.595657 | 'HW_NIC_ACCEL_SSL',
2017-06-06 22:23:07.595668 | 'HW_NIC_ACCEL_TLS',
2017-06-06 22:23:07.595679 | 'HW_NIC_DCB_ETS',
2017-06-06 22:23:07.595689 | 'HW_NIC_DCB_PFC',
2017-06-06 22:23:07.595700 | 'HW_NIC_DCB_QCN',
2017-06-06 22:23:07.595712 | 'HW_NIC_MULTIQUEUE',
2017-06-06 22:23:07.595723 | 'HW_NIC_OFFLOAD_FDF',
2017-06-06 22:23:07.595735 | 'HW_NIC_OFFLOAD_GENEVE',
2017-06-06 22:23:07.595747 | 'HW_NIC_OFFLOAD_GRE',
2017-06-06 22:23:07.595759 | 'HW_NIC_OFFLOAD_GRO',
2017-06-06 22:23:07.595770 | 'HW_NIC_OFFLOAD_GSO',
2017-06-06 22:23:07.595782 | 'HW_NIC_OFFLOAD_L2CRC',
2017-06-06 22:23:07.595794 | 'HW_NIC_OFFLOAD_LRO',
2017-06-06 22:23:07.595808 | 'HW_NIC_OFFLOAD_LSO',
2017-06-06 22:23:07.595820 | 'HW_NIC_OFFLOAD_QINQ',
2017-06-06 22:23:07.595832 | 'HW_NIC_OFFLOAD_RDMA',
2017-06-06 22:23:07.595845 | 'HW_NIC_OFFLOAD_RXHASH',
2017-06-06 22:23:07.595858 | 'HW_NIC_OFFLOAD_RXVLAN',
2017-06-06 22:23:07.595869 | 'HW_NIC_OFFLOAD_SCS',
2017-06-06 22:23:07.595881 | 'HW_NIC_OFFLOAD_TCS',
2017-06-06 22:23:07.595892 | 'HW_NIC_OFFLOAD_TSO',
2017-06-06 22:23:07.595904 | 'HW_NIC_OFFLOAD_TXUDP',
2017-06-06 22:23:07.595916 | 'HW_NIC_OFFLOAD_TXVLAN',
2017-06-06 22:23:07.595928 | 'HW_NIC_OFFLOAD_UCS',
2017-06-06 22:23:07.595939 | 'HW_NIC_OFFLOAD_UFO',
2017-06-06 22:23:07.595951 | 'HW_NIC_OFFLOAD_VXLAN',
2017-06-06 22:23:07.595965 | 'HW_NIC_PROGRAMMABLE_PIPELINE',
2017-06-06 22:23:07.595977 | 'HW_NIC_SRIOV',
2017-06-06 22:23:07.595994 | 'HW_NIC_SRIOV_MULTIQUEUE',
2017-06-06 22:23:07.596007 | 'HW_NIC_SRIOV_QOS_RX',
2017-06-06 22:23:07.596018 | 'HW_NIC_SRIOV_QOS_TX',
2017-06-06 22:23:07.596028 | 'HW_NIC_VMDQ',
2017-06-06 22:23:07.596046 | 'MISC_SHARES_VIA_AGGREGATE',
2017-06-06 22:23:07.596057 | 'STORAGE_DISK_HDD',
2017-06-06 22:23:07.596069 | 'STORAGE_DISK_SSD'])
2017-06-06 22:23:07.596079 | actual = set([])