Updated install verification logic

[sarthakpati]

Fixes #519

Proposed Changes

• removed default copyright message from being picked up, thus allowing the failure to get fixed
• code black for collectStats
• instead of invoking python directly, invoking sys.executable for a less error-prone install solution

Checklist

• I have read the CONTRIBUTING guide
• My PR is based from the current GaNDLF master
• Non-breaking change (does not break existing functionality): provide as many details as possible for any breaking change
• Function/class source code documentation added/updated
• Code has been blacked for style consistency
• If applicable, version information has been updated in GANDLF/version.py
• If adding a git submodule, add to list of exceptions for black styling in pyproject.toml file
• Usage documentation has been updated, if appropriate
• History has been updated, if appropriate
• Tests added or modified to cover the changes; if coverage is reduced, please give explanation
• If customized dependency installation is required (i.e., a separate pip install step is needed for PR to be functional), please ensure it is reflected in all the files that control the CI, namely: python-test.yml, and all docker files [1,2,3,4]

[github-actions]

MLCommons CLA bot All contributors have signed the MLCommons CLA ✍️ ✅

[codecov]

Codecov Report

Merging #520 (29f52b5) into master (8616128) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #520      +/-   ##
==========================================
- Coverage   93.62%   93.60%   -0.02%     
==========================================
  Files         106      106              
  Lines        6726     6726              
==========================================
- Hits         6297     6296       -1     
- Misses        429      430       +1     

Flag	Coverage Δ
unittests	93.60% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...NDLF/data/preprocessing/template_matching/utils.py	95.34% <0.00%> (-2.33%)	⬇️

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[AlexanderGetka-cbica]

Good call.