restore bug 1253482 - keystone ephemeral port conflict

Change-Id: Id0ecf6245d04f826a3d3c9b5ce294c3435576c5d
Related-Bug: #1253482
add bug for bad tempest test with ec2 az

Change-Id: I2545cd3e08ec710952b544144459418d0e0369cb
Related-Bug: #1265672