TEZ-1566. Reduce log verbosity  (Rajesh Balamohan)
(Cherry picked from commit 156e96dc3485dd94d97cd9623d273d8ac3fec32b)
TEZ-1083.  Enable IFile RLE for DefaultSorter  (Rajesh Balamohan)
(Cherry picked from commit c04c7b5e5a08c90e5c128885cbd685d0d14e6ae8)