geode-rebalancer is not part of the binary distribution

The geode-rebalancer jar is not part of the binary distribution. That means that users that want to use the rebalancer must download it and it's dependencies from maven and add them to the server's classpath.

I think the main reason not to include the rebalancer in the server's classpath is the dependency on quartz. But looking at the code, it looks like the only usage of quartz is a one line validation that doesn't need to be there. We should remove the dependency on quartz and include the rebalancer in the geode server's classpath by default.