srm: Log stack trace for bugs while saving jobs

I ran into a IllegalStateException during SRM startup and no
stack trace was logged. This patch adds the code to log a stack
trace when this error occurs. The error itself is not resolved.

Target: trunk
Require-notes: no
Require-book: no
Acked-by: Paul Millar <paul.millar@desy.de>
Patch: http://rb.dcache.org/r/5382/