Implemented func to get CUDA memory usage, implemented automatic,nonGUI version of MPI connection memory tests

[golosio]

Implemented functions to get CUDA memory usage of each MPI process, peak CUDA memory usage of each MPI process, total CUDA memory available for all MPI processes, free CUDA memory available for all MPI processes. Adapted MPI connections CUDA memory check scripts to run on terminal and to check used CUDA memory against theoretical prediction automatically