HIVE-3009
HIVE-4206 Sort merge join does not work for outer joins for 7 inputs
(Namit via Gang Tim Liu)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1459405 13f79535-47bb-0310-9956-ffa450edef68
Merge branch 'HIVE-3009' into mthive-0.10