Changes

[552027] Updates disposal of notification listeners
This change updates the dispose method of the ViatraQueryEventHandler to 
mirror the required creation order from the prepareAttributeMonitor 
method. The change is most likely unnecessary (as opposed to the 
initialization case where the order is extremely important) it makes 
sense to keep the orders consistent to avoid unexpected issues.
Change-Id: Ic8c56c183cab0987522883f1869b24856b8b9522 Signed-off-by:
Zoltan Ujhelyi <zoltan.ujhelyi@incquerylabs.com>