[Issue-1084] Addjust scheduler extender algorithm

[Andrzej-Zukowski]

Purpose

Resolves #1084

Describe your changes

PR checklist

• Add link to the issue
• Choose Project
• Choose PR label
• New unit tests added
• Modified code has meaningful comments
• All TODOs are linked with the issues
• All comments are resolved

Testing

Provide test details

[codecov]

Codecov Report

Attention: 13 lines in your changes are missing coverage. Please review.

Comparison is base (d5847f2) 72.84% compared to head (de99a52) 72.78%.

Files	Patch %	Lines
pkg/scheduler/extender/extender.go	0.00%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1085      +/-   ##
==========================================
- Coverage   72.84%   72.78%   -0.06%     
==========================================
  Files          63       63              
  Lines        8949     8956       +7     
==========================================
  Hits         6519     6519              
- Misses       2142     2149       +7     
  Partials      288      288              

Flag	Coverage Δ
unittests	72.78% <0.00%> (-0.06%)	⬇️

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