minor, enrich tomcat access log by adding user agent
minor, enrich tomcat access log by adding user agent

apache/incubator-kylin,apache/incubator-kylin,apache/incubator-kylin,apache/incubator-kylin,apache/kylin,apache/incubator-kylin,apache/kylin,apache/incubator-kylin,apache/kylin,apache/kylin,apache/kylin,apache/kylin,apache/kylin