Upgrade to Java client 4.6.0

Fixes #44

Author: acogoluegnes

pom.xml

@@ -41,7 +41,7 @@
   </scm>
 
   <properties>
-    <rabbitmq.version>4.5.0</rabbitmq.version>
+    <rabbitmq.version>4.6.0</rabbitmq.version>
     <slf4j-api.version>1.7.25</slf4j-api.version>
     <junit.version>4.12</junit.version>
     <mockito-core.version>2.12.0</mockito-core.version>