Tempest Rhel7: Slaac attributes are ignored

[Nagendra Prasath]

Build: R3.0/51/RHEL/LIBERTY

Testcase: tempest.api.network.test_networks.NetworksIpV6TestAttrs.test_create_delete_subnet_with_v6_attributes_slaac
https://github.com/openstack/tempest/blob/master/tempest/api/network/test_networks.py#L605

Above testcase creates subnet with Slaac attributes ("ipv6_address_mode": "slaac") but its silent ignored ("ipv6_address_mode": null)

Body: {"subnet": {"network_id": "f2e263b9-6e79-4554-bcb2-d5b87b245bce", "ipv6_ra_mode": "slaac", "gateway_ip": null, "ip_version": 6, "ipv6_address_mode": "slaac", "cidr": "2003::/64"}}
    Response - Headers: {'status': '201', 'content-length': '423', 'connection': 'close', 'date': 'Thu, 05 Jan 2017 08:34:56 GMT', 'content-type': 'application/json; charset=UTF-8', 'x-openstack-request-id': 'req-eeb6a76d-a321-40e7-b909-fe6ac23dd61b'}
        Body: {"subnet": {"name": "", "enable_dhcp": true, "network_id": "f2e263b9-6e79-4554-bcb2-d5b87b245bce", "tenant_id": "9502a5c21ff0420f93362f6498711c92", "dns_nameservers": [], "ipv6_ra_mode": null, "allocation_pools": [{"start": "2003::1", "end": "2003::ffff:ffff:ffff:fffe"}], "gateway_ip": "::", "ipv6_address_mode": null, "ip_version": 6, "host_routes": [], "cidr": "2003::/64", "id": "75180973-95da-4a85-b773-7f724184a14f"}}
}}}

[Nagendra Prasath (npchandran)]

Also affects below cases:

tempest.api.network.test_networks.NetworksIpV6TestAttrs.test_create_delete_subnet_with_v6_attributes_stateful
tempest.api.network.test_networks.NetworksIpV6TestAttrs.test_create_delete_subnet_with_v6_attributes_stateless

[Andrey Pavlov (apavlov-e)]

R4.0 + OSPD10, build CB-25 rhel7+newton

same situation.

Traceback (most recent call last):
  File "tempest/api/network/test_networks.py", line 593, in test_create_delete_subnet_with_v6_attributes_slaac
    ipv6_address_mode='slaac')
  File "tempest/api/network/test_networks.py", line 169, in _create_verify_delete_subnet
    self._compare_resource_attrs(subnet, compare_args)
  File "tempest/api/network/test_networks.py", line 141, in _compare_resource_attrs
    expected, exclude_keys))
  File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 435, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: Differences:
  ipv6_ra_mode: expected slaac, actual None
  ipv6_address_mode: expected slaac, actual None

[tikitavi (rtikitavi)]

R4.1 + OSPD10

same situation

Traceback (most recent call last):
  File "tempest/api/network/test_networks.py", line 593, in test_create_delete_subnet_with_v6_attributes_slaac
    ipv6_address_mode='slaac')
  File "tempest/api/network/test_networks.py", line 169, in _create_verify_delete_subnet
    self._compare_resource_attrs(subnet, compare_args)
  File "tempest/api/network/test_networks.py", line 141, in _compare_resource_attrs
    expected, exclude_keys))
  File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 435, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: Differences:
  ipv6_ra_mode: expected slaac, actual None
  ipv6_address_mode: expected slaac, actual None