TAJO-749: nta.cluster.distributed in NConstants should be changed to tajo.cluster...
TAJO-749: nta.cluster.distributed in NConstants should be changed to tajo.cluster...

Change-Id: Id3da7fb270908766525458fc66e81ad47e0aef31
Reviewed-on: https://dbserver.korea.ac.kr/reviews/189
Tested-by:  Jenkins <80754af91bfb6d1073585b046fe0a474ce868509@dbserver.korea.ac.kr>
Reviewed-by: Hyunsik Choi <05a3172daee8e68f070c7e3940f4ecf228130ad0@gmail.com>

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