oslo.service triggers shutdown

As oslo.service now triggers shutdown, we should remove
our stop call as this triggers service shutdown code to be
executed twice in a row.

Change-Id: I262d4b9aa35b420c9b5f5131c414f7eb4f4fec1a

designate/service.py

@@ -132,6 +132,8 @@ class RPCService(object):
                 e.start()
 
     def stop(self):
+        LOG.debug("Stopping RPC server on topic '%s'" % self._rpc_topic)
+
         for e in self._rpc_endpoints:
             if e != self and hasattr(e, 'stop'):
                 e.stop()
@@ -393,5 +395,5 @@ def wait():
     try:
         _launcher.wait()
     except KeyboardInterrupt:
-        _launcher.stop()
+        LOG.debug('Caught KeyboardInterrupt, shutting down now')
     rpc.cleanup()