Squashed commit of the following:

commit 987931a7942f4b00edcc921b119e375e7ba92f9a
Author: Christian Pape <Christian.Pape@informatik.hs-fulda.de>
Date:   Mon Oct 20 19:06:11 2014 +0200

    Lazy initialization of the NodeDao instances in VmwareMonitor, VmwareCimMonitor and CiscoPingMibMonitor