Performance improvement - JobSchedulerJobAdapter should reduce API calls

Current Situation

• sos.scheduler.job.JobSchedulerJobAdapter uses the sos.spooler Java API to set some variables, e.g. a Logger log level or specials variables like SCHEDULER_JOB_CHAIN_NAME, SCHEDULER_ORDER_ID, ...
• The sos.spooler objects are queried redundantly

Desired Behaviour

• sos.scheduler.job.JobSchedulerJobAdapter should reduce sos.spooler API calls