closed araqne/issue#145. modified to check logger is running.
fixed join subquery result file handle leak
fixed pom conflict
Merge branch 'master' into another-master

Conflicts:
	araqne-log-api/pom.xml
	araqne-logdb-jmx/pom.xml
	araqne-logdb-jython/pom.xml
	araqne-logdb/pom.xml
	araqne-logfile-parser/pom.xml
	araqne-logstorage/pom.xml
	araqne-snmptrap-parser/pom.xml
	araqne-syslog-parser/pom.xml
handle license lock in LogStorageEngine