[test] Add flexible HPCG test

[sekelle]

Added checks for two HPCG implementations.

Fixes #550.

[jenkins-cscs]

Can I test this patch?

[codecov-io]

Codecov Report

Merging #604 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #604      +/-   ##
==========================================
+ Coverage   91.62%   91.64%   +0.02%     
==========================================
  Files          72       72              
  Lines        9191     9191              
==========================================
+ Hits         8421     8423       +2     
+ Misses        770      768       -2

Impacted Files	Coverage Δ
reframe/core/config.py	84.34% <0%> (+1.73%)	⬆️

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[victorusu]

@sebkelle1, The checks look great to me, but I have just a few questions related to extending to other systems. And a philosophical question about when we should consider a test to failure performance.

[vkarak]

Thanks for the PR. It's in a good shape. I have only a couple of minor comments. The test should also be placed under cscs-checks/microbenchmarks.

[vkarak]

@sebkelle1 Can you address the review comments so that we can merge this?

[pep8speaks]

Hello @sebkelle1, Thank you for updating!

Cheers! There are no PEP8 issues in this Pull Request!Do see the ReFrame Coding Style Guide

Comment last updated on January 11, 2019 at 10:17 Hours UTC

[vkarak]

There are still a couple of formatting issues reported by pep8speaks. I have suggested a styling in one of those. I have also one question regarding the base test. See my individual comments.

[vkarak]

@teojgo @victorusu Could you please have a look and approve this PR?

[vkarak]

@jenkins-cscs retry daint kesch