test: Add igor testcases for network and mounts

The ai_extended.suite now includes the extended.set which was created
and contains

verify_network_setup.sh - A testcases which looks at /etc/defaults/ovirt
  and verifies that the devices are configured accordingly.

check_common_mounts.sh - A testcases which cheks that well-known mounts
  like /var/log and /data are mounted correctly to e.g. HostVG-Logging
  and HostVG-Data.

The purpose of this tests is to disocver integration problems and
regressions from a high-level view.

Change-Id: I1dd13d8594150d1a9f2093de039bc7d47ff6cf35
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>