HELP-21046: force_fine_statistics has been replaced with rates_mode

rabbitmq/rabbitmq.config

@@ -3,5 +3,6 @@
           ,{vm_memory_high_watermark, 0.8}
           ,{loopback_users, []}
          ]},
-{rabbitmq_management_agent, [ {force_fine_statistics, false} ] }
+{rabbitmq_management, [{rates_mode, none}]},
+{rabbitmq_management_agent, [{rates_mode, none}]}
 ].