Since: [1] and corresponding issue: [2] JCraft JSch code is extracted in
its own artifact: @jgit//org.eclipse.jgit.ssh.jsch:ssh-jsch. Adapt the
code correspondingly to that split.
This change is updating JGit module. The change we need:
8d2d68365 Decouple JSch from JGit Core
[1] https://git.eclipse.org/r/#/c/156153
[2] https://bugs.eclipse.org/bugs/show_bug.cgi?id=553625
Change-Id: I4a1f5f4ffbbf07b4455780c1b82b8d9005377585