Update TARTARUS_HOME to /storage5

[glwagner]

storage7 doesn't actually exist.

[navidcy]

There is something fishy with MPI.jl..

[christophernhill]

There is something fishy with MPI.jl..

CPU or GPU (or both!) ?

[navidcy]

There is something fishy with MPI.jl..

CPU or GPU (or both!) ?

There are only CPU distributed tests and they are failing before they even start:
https://buildkite.com/clima/oceananigans/builds/3587#c5384940-778a-42c1-842b-c57c1209b786

This error beats me. :(

[glwagner]

There is something fishy with MPI.jl..

CPU or GPU (or both!) ?

There are only CPU distributed tests and they are failing before they even start:
https://buildkite.com/clima/oceananigans/builds/3587#c5384940-778a-42c1-842b-c57c1209b786

This error beats me. :(

I think it's a problem (bug?) with MPI.jl or something else outside Oceananigans. The error seems to suggest that some package associated with MPICH_jll thinks we are on MacOS. It's surprising because we didn't upgrade packages. However, we are running on a new system (shiny Ubuntu 20.04) and that may be the issue.