Fix/darshan

[mtitov]

Updated Darshan integration based on the latest experience of using it

[codecov]

Codecov Report

Attention: Patch coverage is 72.05882% with 38 lines in your changes missing coverage. Please review.

Project coverage is 71.46%. Comparing base (dec1451) to head (56c8485).
Report is 139 commits behind head on devel.

Files with missing lines	Patch %	Lines
src/radical/entk/tools/provenance.py	22.22%	28 Missing ⚠️
src/radical/entk/tools/darshan.py	91.39%	8 Missing ⚠️
src/radical/entk/appman/wfprocessor.py	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            devel     #661      +/-   ##
==========================================
+ Coverage   71.33%   71.46%   +0.13%     
==========================================
  Files          23       26       +3     
  Lines        2114     2250     +136     
==========================================
+ Hits         1508     1608     +100     
- Misses        606      642      +36     

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[mtitov]

todo:

• add more tests

[mtitov]

@andre-merzky ready for review

[andre-merzky]

Thanks @mtitov, the code looks reasonable to me.

What I am missing is some explanation what Darshan actually is and what it is used for. For example: some methods are public methods and will show up in RTD, but don't have a docstring, so the user is left guessing what this is about.