Comment 3 for bug 1451559

Reviewed: https://review.openstack.org/180299
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=251f551a5fe8fe05cdc8c9b9cfad357245b39bb9
Submitter: Jenkins
Branch: master

commit 251f551a5fe8fe05cdc8c9b9cfad357245b39bb9
Author: Ryan Tidwell <email address hidden>
Date: Mon May 4 15:56:41 2015 -0700

    Block subnet create when a network hosts subnets allocated from different pools

    This change will ensure that all subnets with the same ip_version on a given
    network have been allocated from the same subnet pool or no pool. This
    provides cleaner subnet overlap detection.

    Change-Id: I3c7366c69b10c202c0511126fbee6b3aac36759e
    Closes-Bug: #1451559