Pin md5s3stash to commit 7c32a3270198ae9b84f22a4852fe60105f74651b
Pin md5s3stash to commit 7c32a3270198ae9b84f22a4852fe60105f74651b

Stopgap until the "validate" test fixed

barbarahui/harvester,ucldc/harvester,ucldc/harvester,barbarahui/harvester,mredar/harvester,mredar/harvester