Reduce how often forced leveldb compactions occur.

git-svn-id: https://svn.apache.org/repos/asf/activemq/activemq-apollo/trunk@1484057 13f79535-47bb-0310-9956-ffa450edef68
Fix bug were stats were not consistent.

git-svn-id: https://svn.apache.org/repos/asf/activemq/activemq-apollo/trunk@1484058 13f79535-47bb-0310-9956-ffa450edef68