Comment 7 for bug 1649503

Reviewed: https://review.openstack.org/465958
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=7534c0066354a2e2df03dacfcf89820539d2306f
Submitter: Jenkins
Branch: stable/newton

commit 7534c0066354a2e2df03dacfcf89820539d2306f
Author: Hong Hui Xiao <email address hidden>
Date: Tue Dec 13 16:29:08 2016 +0800

    Retrieve fresh network DB data before getting it in ml2

    The DB objects that have join relationship with network, will be
    acquired once during a DB transaction.
    However, if they are updated after the first acquisition, the network
    DB model object maintains the older value, and doesnt update it.

    After cd7d63bde92e47a4b7bd4212b2e6c45f08c03143, the updated network
    is retrieved from the db causing this bug.
    This patch retrieves the latest data for these DB objects so that
    updated information can be used.

    In order to pass functional tests, get_network is still called instead
    of _make_network_dict as in original change.

    Change-Id: Ic8935008515bed687ad3abd00c8ccaf656a30452
    Closes-Bug: #1649503
    (cherry-pick from commit e5ad765484e546b9f857a91c0fea41ebfd87adab)