HADOOP-15900. Update JSch versions in LICENSE.txt.
(cherry picked from commit d43cc5db0ff80958ca873df1dc2fa00054e37175)
Conflicts:
LICENSE.txt
(cherry picked from commit 939827daa65b61431cdb66d0ac266b902b8734c4)
(cherry picked from commit 1f3899fa3b46543e49702f71ce7641463a893886)