wrong IP allocation for multiple PTGs in same L2P

[Ivar Lazzaro]

How to reproduce:

Create one L2P, and associate 2 PTGs to it.

Now create 1 PT in PTG2 and one in PTG1, both of them will get an IP address from the subnet of PTG1 ! The reason for this is how GBP creates the implicit Port only by specifying the network ID, leaving thus to Neutron the choice of which subnet in that network to use (in this case, both the subnets of PTG1 and PTG2 are in the same Neutron network).

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/209700
Committed: https://git.openstack.org/cgit/stackforge/group-based-policy/commit/?id=af792bc6252088e94e10c96eb648a66a935e5b09
Submitter: Jenkins
Branch: master

commit af792bc6252088e94e10c96eb648a66a935e5b09
Author: Ivar Lazzaro <email address hidden>
Date: Wed Aug 5 16:28:53 2015 -0700

    allocate implicit pt port in the right subnet

    When a PT is created with implicit port, try to allocate the port
    in each of the PTG's subnets until one address is available.

    Change-Id: I70647209346eb85401e45430c315669c38f0034c
    Closes-bug: 1481973
    Closes-bug: 1418738

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/juno
Review: https://review.openstack.org/213406

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/213406
Committed: https://git.openstack.org/cgit/stackforge/group-based-policy/commit/?id=53ae272ed296a4fd252f322eb2a707996759a997
Submitter: Jenkins
Branch: stable/juno

commit 53ae272ed296a4fd252f322eb2a707996759a997
Author: Ivar Lazzaro <email address hidden>
Date: Wed Aug 5 16:28:53 2015 -0700

    allocate implicit pt port in the right subnet

    When a PT is created with implicit port, try to allocate the port
    in each of the PTG's subnets until one address is available.

    Change-Id: I70647209346eb85401e45430c315669c38f0034c
    Closes-bug: 1481973
    Closes-bug: 1418738
    (cherry picked from commit af792bc6252088e94e10c96eb648a66a935e5b09)