Added a check to add parent nodes only on trees other than vandt tree.

Added a check to add parent nodes based on @sb[:open_nodes] only when active tree is not vandt tree. VandT tree no longer needs to add parent nodes when clicking on a VM as we are building full tree on initial load so all parent nodes already exist in the tree.

https://bugzilla.redhat.com/show_bug.cgi?id=1086015