misc: Fix name parsing

Use last two digits of year.

Signed-off-by: Sam Lang <sam.lang@inktank.com>
misc: Use pythonic 'is not None' for jobid case

The conditional 'if global_jobid:' evaluates to true
in some cases even when global_jobid is None.

Signed-off-by: Sam Lang <sam.lang@inktank.com>