test to show that: https://issues.apache.org/jira/browse/AMQ-4677 is not an issue.  Verifies that the LevelDB logs are cleared as messages are consumed.  

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1514502 13f79535-47bb-0310-9956-ffa450edef68