ARGUS-5: added support for %app-type% token in file and directory names,
to enable configuration of separate log directories for HBase Master and
Regional servers, HiveServer2 and HiveCLI. Audit framework
initialization call deferred to a point where the application-type
information is available.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-argus
ARGUS-5: updates per review comments:
 - default location of audit logs changed to /var/logs/xasecure/audit
and hdfs://%hostname%:8020/xasecure/audit
 - log message improvement
 - fixed retry interval on flush() failures.