Fix flake8 failures

Right now tox -e pep8 in this project fails due to some violations
in the tempest element.  Those will need to be fixed before we can
do any gating on pep8-type tests.

Change-Id: I8c63e9db4e86ef6209ef7676ee0c5ca289845f96
Add +x to executable files

There are a few in the tree that don't have it and should.  This
will allow future enforcement of this to avoid files being
committed with the wrong mode set.

Change-Id: Ie22a663a230f087b678c01a16219e1c5b7e237c0
Treat failure to hear back from neutron as non fatal

A recent change to nova requires neutron to have admin credentials in
order to report back to nova that VIF plugging is complete. Our neutron
doesn't have the appropriate credentials and adding them isn't trivial
as we don't know the tenant id when we do the heat stack-create of the
overcloud.

This commit should be considered a temporary workaround that disables the
requirement, this will unblock ci while we figure out how to handle the
problem correctly.

Related-Bug: #1293782

Change-Id: I1a31d31e3d3ab923217eaf3b2e865a28dd57ec44
Merge "Fix flake8 failures"
Merge "Add +x to executable files"