Restart daemons after updating

I pushed a new version of the ganglia rpms to test a fix for the locking issue I've mentioned on the ganglia-developer's list.  In the process, I discovered that the rpm upgrade process didn't restart the newly updated daemons.  

I've cherry-picked these changes from my release/3.6 branch, as it also has my gmond lock fixes.  I'm holding off on that pull request until it has a bit more test time..