HIVE-5554 : add more comments to CombineHiveInputFormat.java, BucketizedHiveInputFormat.java (Thejas Nair via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/trunk@1536517 13f79535-47bb-0310-9956-ffa450edef68