change guess for workdir to '/SNS/snfs1/scratch'

Zhang, Chenrequested to merge
github/fork/naughtont3/sns-snfs1-scratch-workdir3 into main

Created by: naughtont3

Based on slightly older version of code @ 2e5c0a12

Signed-off-by: Thomas Naughton naughtont@ornl.gov

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