Comment 1 for bug 1817631

Reviewed: https://review.openstack.org/638858
Committed: https://git.openstack.org/cgit/openstack/python-tripleoclient/commit/?id=1a71c441fa8958896d7f380636075612c67bf7da
Submitter: Zuul
Branch: master

commit 1a71c441fa8958896d7f380636075612c67bf7da
Author: Alex Schultz <email address hidden>
Date: Sat Feb 23 12:54:23 2019 -0700

    Check that the networks are defined on update

    Check defined networks in the resource registry of the stack against the
    networks defined in the environment files. If the environment provided
    doesn't have the networks defined, it's likely they were improperly
    dropped which can lead to deployment issues. This is a light check that
    only checks for the existance of the networks but not the contents of
    those networks. This handles the case where a user forgets to include
    the network-isolation configuration on a subsequent update to the cloud.
    This does not prevent a user from changing the contents of the networks
    to something that breaks their deployment.

    Partial-Bug: #1817631
    Change-Id: Ia97a2367770e37bf8c55f2fd04c9a9efde914a67