Batch finalization messages

[kurtkilpela]

When finalization events occur, a ReleaseServices command is sent over the wire, for each finalization event. This is part of lifecycle management for Services registered with the framework. The currently implementation only includes a single finalization event in each ReleaseServices command.

ReleaseServices and the wire protocol both support an arbitrary number of finalization events per command. Right now they just aren't batched together.

All finalization events occurring during a set interval, should be batched together.