Add logs during tests

Author: acogoluegnes

src/test/resources/logback-test.xml

@@ -5,6 +5,8 @@
         </encoder>
     </appender>
 
+    <logger name="com.rabbitmq.client.test.BrokerTestCase" level="info" />
+
     <root level="warn">
         <appender-ref ref="STDOUT" />
     </root>