Fixed issues with multiple networks

In Murano system test we run VM with Murano image
before the OSTF tests to verify that it will be
successfully cached in Glance.

This patch set adds network configuration for
this VM.

Change-Id: I94a15e521b0fbde6238b21140ed25412601f1f30
Closes-Bug: #1343260
Merge "Fixed issues with multiple networks"