fix: use DET1 instead of EPIC on S3
Currently we have, so writing to EPIC/
fails.
12:54:14 wdconinc@menelaos ~ $ mc ls S3rw/eictest
[2022-08-25 12:54:20 CDT] 0B ATHENA/
[2022-08-25 12:54:20 CDT] 0B CORE/
[2022-08-25 12:54:20 CDT] 0B DET1/
[2022-08-25 12:54:20 CDT] 0B ECCE/