JSch authentication retries until server maxes out allowed attempts

[gschueler]

If the SSH server has a maximum login attempts that will lock a user account, then even a single run of a job with a bad SSH password will lock an account.

Problem: JSch does not limit the amount of authentication attempts, and will retry as often as the server's max-attempts, which may trigger account lock behavior.

Fix: upgrade to JSch 0.1.46+, and use the MaxAuthTries configuration to limit it to 1 auth attempt