engine: Move local variable into function

The patch move a local variable into function
which was initialized by VdsBrokerObjectsBuilder.updateNetworkData
but never used (only locally within the function).

Change-Id: I3bd0de9b4be0405932cbc91e18681e38595ba9ba
Signed-off-by: Moti Asayag <masayag@redhat.com>