Fix issue #30 rewind of message ByteBuffer

tools_scripts/publisher_client.groovy

@@ -17,7 +17,7 @@ MqttMessage message = new MqttMessage('Hello world!!'.bytes)
 message.setQos(0)
 print "publishing.."
 long startTime = System.currentTimeMillis()
-(1..100000).each {
+(1..10).each {
     client.publish('topic', 'Hello world!!'.bytes, 0, false)
 }
 client.publish('/exit', 'Exit'.bytes, 0, false)
@@ -25,4 +25,4 @@ long stopTime = System.currentTimeMillis()
 long spentTime = stopTime -startTime
 println "published in ${spentTime} ms"
 client.disconnect()
-println "disconnected"
+println "disconnected"