TAJO-586: containFunction shouldn't throw NoSuchFunctionException. (jinho)
TAJO-588: In some case, leaf task of DefaultTaskScheduler are not distributed execution. (jinho)
TAJO-583: Broadcast join does not work on partitioned tables.
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/incubator-tajo into TAJO-584

Conflicts:
	tajo-core/tajo-core-backend/src/main/java/org/apache/tajo/engine/planner/PhysicalPlannerImpl.java
Merge branch 'TAJO-584' of github.com:hyunsik/incubator-tajo into TAJO-584
TAJO-583: Broadcast join does not work on partitioned tables.
changed the default settings.