/usr/share/ant/lib/ant-jsch.jar is in ant-optional 1.9.6-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/ant/lib/../../java/ant-jsch-1.9.6.jar
/usr/share/ant/lib/../../java/ant-jsch-1.9.6.jar