ARGUS-134:
- configured audit-to-HDFS to use async mode to write to local file
buffer.
- updated async-audit to use java.util.concurrent.BlockingQueue, instead
of using synchornized blocks to access Queue
- updated default audit configuration, to enable HBase with
'audit-to-HDFS' and other components with 'audit-to-DB'
- added INFO logs in audit-to-HDFS for open/close of HDFS files
- updated async-audit with better stats message, to include count of
incoming logs and queue-size
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-argus
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-argus
ARGUS-134: updated default value of HDFS directory name in
install.properties