HIVE-4689 : For outerjoins, joinEmitInterval might make wrong result (Navis via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1499453 13f79535-47bb-0310-9956-ffa450edef68

Conflicts:
	ql/src/java/org/apache/hadoop/hive/ql/exec/JoinOperator.java