WS-1574 Part 2 of PIMS auto delete

Needed quotes around the variable for existence testing...thrilling I know. Manually changed on dev.

shared/workspaces/alembic/versions/templates/vlass_image_caching/caching_sh_2.8.3.txt

 #!/bin/sh
 export CAPO_PROFILE=vlass.{{vlass_env}}
 
-if [ -n $5 ]; then
+if [ -n "$5" ]; then
     ./pimscache rm -c $1 -p $2
 fi