[gen/oar-properties] close SSH connection to avoid an error message

"zlib(finalizer): the stream was freed prematurely."

lib/refrepo/gen/oar-properties.rb

@@ -828,6 +828,7 @@ def run_commands_via_ssh(cmds, options, verbose=true)
     }
   }
   c.loop
+  c.close
   return res
 end