Benchpress/graph500

[meteorfox]

Adds Graph500 OpenMP CSR benchmark

Example of actual output of running Graph500 through Benchpress:

$ OMP_NUM_THREADS=1 python3.6 ./benchpress_cli.py -b benchmarks.yml -j jobs/jobs.yml run graph500_omp_csr
Will run 1 job(s)
Running "graph500_omp_csr": Graph500 OpenMP Compressed-Sparse-Row
{
  "firstquartile_TEPS": 63331410.29358231,
  "harmonic_mean_TEPS": 64832533.056823656,
  "harmonic_stddev_TEPS": 667812.4890618721,
  "max_TEPS": 85892410.57274126,
  "median_TEPS": 64781042.87450379,
  "min_TEPS": 49649920.68025839,
  "thirdquartile_TEPS": 66771695.51119673
}