Create router port without fixed_ips should not associate IPv6 SLAAC addrs

[Dane LeBlanc]

Consider the following sequence:
- Create a neutron network
- Create multiple subnets on the network, including one or more IPv6 SLAAC
  subnets
- Create a router port on the network without specifying fixed_ips

The port created in this case is incorrectly getting associated with
addresses from the SLAAC subnet(s).

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/164477

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/164477
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=d74603cb8136bf8b9574e7197892f8f762221688
Submitter: Jenkins
Branch: master

commit d74603cb8136bf8b9574e7197892f8f762221688
Author: Dane LeBlanc <email address hidden>
Date: Sat Mar 14 20:54:16 2015 -0400

    No IPv6 SLAAC addrs for create router intf without fixed_ips

    Consider the following sequence:
    - Create a neutron network
    - Create multiple subnets on the network, including one or more IPv6 SLAAC
      subnets
    - Create a router port on the network without specifying fixed_ips

    The port created in this case is incorrectly getting associated with
    addresses from the SLAAC subnet(s). This patch corrects this
    behavior.

    Change-Id: Ic0ab2294c5487f85baade8f879946dfe738d109b
    Closes-Bug: 1432270

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: neutron-pecan
Review: https://review.openstack.org/185072