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Add support to Kerberos ticket with new "renew-until" date for already submitted jobs
While using Kerberos ticket forwarding on a LSF cluster:
Currently TGT found on the submission host is copied to LSF cache and forwarded to the execution host at job submission; These tickets can be renewed automatically by LSF until the TGT "renew-util" date is reached.
This behaviour could introduce some issues for long-pending or long-running jobs on the clusters, especially in case the Kerberos tickets management system is a corporate service that could not be easily tuned for HPC purpose.
Proposal: Let LSF check for new TGT on the submission host for already submitted jobs - and update the cached TGT when applicable; Users and/or administrators could then manage to update TGT on the submission host, and LSF would propagate the new ticket to existing pending and running jobs.
This would be highly valuable to get rid of this "renew-until" limit.
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