Pass service_mac to _get_ovn_dhcpv6_opts when syncing

[Dong Jun]

Otherwise a warning occurred for stateless DHCP because _get_ovn_dhcpv6_opts get a new random mac and options mismatch.
 WARNING networking_ovn.ovn_db_sync [req-d06637a5-e471-44f5-b51d-9c66a7df8ca1 None None] DHCP options for subnet 6e07788a-e9db-4008-b855-227da431ec1e is present in Neutron but out of sync for OVN

subnet info
+-------------------+-------------------------------------------------------------------------------+
| Field | Value |
+-------------------+-------------------------------------------------------------------------------+
| allocation_pools | {"start": "fda3:a412:89af::2", "end": "fda3:a412:89af:0:ffff:ffff:ffff:ffff"} |
| cidr | fda3:a412:89af::/64 |
...
| enable_dhcp | True |
| gateway_ip | fda3:a412:89af::1 |
| host_routes | |
| id | 6e07788a-e9db-4008-b855-227da431ec1e |
| ip_version | 6 |
| ipv6_address_mode | dhcpv6-stateless |
| ipv6_ra_mode | dhcpv6-stateless |
| name | v6_sub |
...
+-------------------+-------------------------------------------------------------------------------+

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/455677

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/455677
Committed: https://git.openstack.org/cgit/openstack/networking-ovn/commit/?id=24c5ca9ca0e39ed5ad6477985f30f84b42e7d3e1
Submitter: Jenkins
Branch: master

commit 24c5ca9ca0e39ed5ad6477985f30f84b42e7d3e1
Author: Dong Jun <email address hidden>
Date: Tue Apr 11 19:42:20 2017 +0800

    Pass original mac to _get_ovn_dhcpv6_opts when syncing

    Pass original mac to _get_ovn_dhcpv6_opts when syncing, otherwise a
    warning occurred for stateless DHCP because _get_ovn_dhcpv6_opts uses
    a new random mac and then options do not match.

    Change-Id: Id24083953f2eab4ef7e5035a3eece76e007e002f
    Closes-Bug: #1681621
    Signed-off-by: Dong Jun <email address hidden>

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/networking-ovn 3.0.0.0b2 development milestone.