If the root user start the JobScheduler then sometimes the startscript tries to change the user endless.

If the root user starts the JobScheduler with

./bin/jobscheduler.sh start

then the user is changed to the JobScheduler user.

This mechanism is improved.
Previously the user was checked via the $USER variable and starts itself possibly

test "$USER" = "$SCHEDULER_USER" || exec su - $SCHEDULER_USER -c "$0 $*"

Sometimes the $USER environment variable is always empty so that an endless recursive call was possible.

Now the user change via su is only for one time called.