bugfix: regression network qos

Inbound and Outbound parameters are no longer dispatched
through the configurator when adding a network, this means
that configured network will not present the desired
QoS. See previously merged implementation
http://gerrit.ovirt.org/#/c/15724/17/vdsm/configNetwork.py

* Patchset 1 - Improving a previously defined functional test
               and verified that the current implementation make
               the updated test fail.

* Patchset 2 - Adding missing qos parameters to configureLibvirtNetwork
               verified the code behaviour.

Change-Id: I306db7f04dd302f857dc263f3c536659aef5a161
Signed-off-by: Giuseppe Vallarelli <gvallare@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/17241
Reviewed-by: Dan Kenigsberg <danken@redhat.com>