Improve resource assignment for comp. services

[mguidon]

We need a concept for:

• serial (1 core)
• multithreaded (M cores)
• MPI (N cores)
• MPI-multithreaded (N cores x M cores)
• GPU accelerated (C cards x M cores)

I suggest to do this using two settings on the service labels

Runtype:

One of: [serial, MPI, GPU accelerated]

Resources

any combination of:

threads: number of cores
ranks: number of MPI process
gpus: number of GPUs to use

If nothing defined on service-labels, defaults to 1 core non threaded, non MPI non GPU. Otherwise, reasonable defaults are provided.

[sanderegg]

this is outdated. resources can be applied. if this is still needed, please upgrade the case or create a new one.