Review and correct use of $DATA/$DATAROOT in each job

[KateFriedman-NOAA]

Review how each job is using $DATA and/or $DATAROOT. Make sure each job is creating/using its own distinct rundir, which utilizes job id (pid). Correct/update as needed to make the DATA/DATAROOT usage consistent across jobs.

Related to issue #401

[KateFriedman-NOAA]

Mostly resolved through recent updates to scripts and the addition of jjob_header.sh. Review scripts for any lingering cases and resolve. Close issue if none found.