Add detect rhel version to testkomodo script

[andreas-el]

Resolves #663

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.26%. Comparing base (011afce) to head (9ad525c).
Report is 2 commits behind head on main.

❗ Current head 9ad525c differs from pull request most recent head c779d6f. Consider uploading reports for the commit c779d6f to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #664   +/-   ##
=======================================
  Coverage   86.26%   86.26%           
=======================================
  Files          50       50           
  Lines        6990     6991    +1     
=======================================
+ Hits         6030     6031    +1     
  Misses        960      960           

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[berland]

lgtm