More logging for errors during noded RPC calls

Reviewed-by: iustinp

daemons/ganeti-noded

@@ -66,7 +66,11 @@ class NodeDaemonRequestHandler(http.HTTPRequestHandler):
       raise httperror.HTTPNotFound()
 
     try:
-      return method(self.post_data)
+      try:
+        return method(self.post_data)
+      except:
+        logging.exception("Error in RPC call")
+        raise
     except errors.QuitGanetiException, err:
       # Tell parent to quit
       os.kill(self.server.noded_pid, signal.SIGTERM)