tests: setupNetworks add net bond breaking and resizing.

Added 3 functional tests to cover cases of new networks
on top of a bond after resizing/breaking and behaviour
of setup networks which should keep a network when
resizing a bond.

List of added functional tests:

* testSetupNetworksAddNetworkToNicAfterBondResizing
* testSetupNetworksAddNetworkToNicAfterBondBreaking
* testSetupNetworksKeepNetworkOnBondAfterBondResizing

Change-Id: I9e031599ac4457cc24cb9d142110e1781325912f
Signed-off-by: Giuseppe Vallarelli <gvallare@redhat.com>
Signed-off-by: Antoni S. Puimedon <asegurap@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/17634
Reviewed-by: Mark Wu <wudxw@linux.vnet.ibm.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>