Add version 6.1. to ESSL spackage file. (#8170)
Add version 6.1. to ESSL spackage file. (#8170)


krafczyk/spack,tmerrick1/spack,mfherbst/spack,krafczyk/spack,LLNL/spack,iulian787/spack,mfherbst/spack,iulian787/spack,iulian787/spack,krafczyk/spack,matthiasdiener/spack,krafczyk/spack,LLNL/spack,iulian787/spack,mfherbst/spack,krafczyk/spack,matthiasdiener/spack,LLNL/spack,tmerrick1/spack,tmerrick1/spack,matthiasdiener/spack,tmerrick1/spack,mfherbst/spack,matthiasdiener/spack,LLNL/spack,mfherbst/spack,iulian787/spack,LLNL/spack,matthiasdiener/spack,tmerrick1/spack