Fix two small problems with Addnode/Deletenode.
1. Do not start a second copy of the event scheduler. This is the cause of all the slurm error messages on the APT cluster. Clearly this was wrong for DeleteNode(). AddNode is still open for debate, but at least now the error mail will stop. 2. Do not reset the startstatus either, this was causing web interface to think startup services were running, when in fact they are not since the other nodes are not rebooted. In the classic interface, node reboot does not change the startstatus either, so lets mirror that in the Geni interface.
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