Fix InvalidInstanceID.NotFound handling

The matcher used with boto tests is returing with None,
 when it matches. The incorrect condition handling may lead to
longer deletion time or failure.

Change-Id: I7d03528ab6183dd9a49169c0a6ec2a4a95fb7d52
Extend network debug infos on network failures

After the https://review.openstack.org/#/c/76640/ is merge tempest will
be allowed to dump the ovs db.

The ovs db dump can help in identifying trunk/access port miss configuration
issues.

Change-Id: Ia751dc5046ce07369b9044eda3b20c63d38bac99
Merge "Extend network debug infos on network failures"
Merge "Fix InvalidInstanceID.NotFound handling"