HSRP/VRRPGroup management code

This code finds every HSRPGroup and VRRPGroup object in the Topology Split Manager’s topology and inserts the name and group size of each found group object into a table. It then forwards the table to the IP Availability Managers.

Each IP Availability Manager finds every HSRPGroup and VRRPGroup in its topology and compares its size to the size of the same group in the table. If the size of a HSRPGroup or VRRPGroup in the IP Availability Manager is smaller than the size of the same group in the Topology Split Manager, the IP Availability Manager unmanages the group during the postprocessing phase of pending discovery. Reason: A smaller group indicates an incomplete group, and an incomplete group might cause erroneous events.