Fix rabbitMQ consumer handle interceptor

[jaehong-kim]

Fix rabbitMQ consumer handle interceptor

Related logs.

Exception:java.lang.UnsupportedOperationException: disable trace
  at com.navercorp.pinpoint.profiler.context.DisableTrace.traceBlockEnd(DisableTrace.java:70) ~[pinpoint-profiler-2.3.3.jar:2.3.3]
  at com.navercorp.pinpoint.plugin.rabbitmq.client.interceptor.RabbitMQConsumerHandleCompleteInboundCommandInterceptor.after(RabbitMQConsumerHandleCompleteInboundCommandInterceptor.java:138) ~[pinpoint-rabbitmq-plugin-2.3.3.jar:2.3.3]
  at com.navercorp.pinpoint.bootstrap.interceptor.ExceptionHandleAroundInterceptor.after(ExceptionHandleAroundInterceptor.java:44) [?:2.3.3]
  at com.rabbitmq.client.impl.AMQChannel.handleCompleteInboundCommand(AMQChannel.java:204) [amqp-client-5.9.0.jar!/:5.9.0]
  at com.rabbitmq.client.impl.AMQChannel.handleFrame(AMQChannel.java:114) [amqp-client-5.9.0.jar!/:5.9.0]
  at com.rabbitmq.client.impl.AMQConnection.readFrame(AMQConnection.java:739) [amqp-client-5.9.0.jar!/:5.9.0]
  at com.rabbitmq.client.impl.AMQConnection.access$300(AMQConnection.java:47) [amqp-client-5.9.0.jar!/:5.9.0]
  at com.rabbitmq.client.impl.AMQConnection$MainLoop.run(AMQConnection.java:666) [amqp-client-5.9.0.jar!/:5.9.0]
  at java.lang.Thread.run(Thread.java:748) [?:1.8.0_161]

AFTER. Caused:null
Exception:java.lang.NullPointerException: null
loggerName:com.navercorp.pinpoint.plugin.rabbitmq.client.interceptor.RabbitMQConsumerHandleCompleteInboundCommandInterceptor