BibSched: fix monitor

* Fixes problems with monitor after master merge, such as
  missing config variable CFG_BIBSCHED_NON_CONCURRENT_TASKS default
  value, datetime calls and Task object lookups.

Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
base: CFG_RUNDIR addition

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
BibSched: fix usage of CFG_RUNDIR config variable

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>