TAJO-800: Worker가 실제 태스크를 마치지 못했을 때 finalize 메시지를 받으면 태스크를 종료하도록 수정
TAJO-800: Worker가 실제 태스크를 마치지 못했을 때 finalize 메시지를 받으면 태스크를 종료하도록 수정

Change-Id: If296c2708209eb8e941985574baec7e267a6daf0
Reviewed-on: https://dbserver.korea.ac.kr/reviews/231
Tested-by:  Jenkins <80754af91bfb6d1073585b046fe0a474ce868509@dbserver.korea.ac.kr>
Reviewed-by:  jihoon <aab69fafc47132a7e8683f78a24334d1bf9d8387@korea.ac.kr>

yeeunshim/tajo_test,hyunsik/incubator-tajo,hyunsik/incubator-tajo,gruter/tajo-cdh,gruter/tajo-cdh,apache/incubator-tajo,apache/incubator-tajo,yeeunshim/tajo_test,gruter/tajo-cdh,hyunsik/incubator-tajo,gruter/tajo-cdh,yeeunshim/tajo_test,yeeunshim/tajo_test,apache/incubator-tajo,hyunsik/incubator-tajo,apache/incubator-tajo