[develop] Reset cached values when cluster is stopped

[NSsirena]

Description of changes

• Reset cached values when cluster is stopped

Tests

• test slurm protected_mode is failing due to cached results.

Checklist

• Make sure you are pointing to the right branch and add a label in the PR title (i.e. 2.x vs 3.x)
• Check all commits' messages are clear, describing what and why vs how.
• Make sure to have added unit tests or integration tests to cover the new/modified code.
• Check if documentation is impacted by this change.

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[codecov]

Codecov Report

Merging #5550 (876cca7) into develop (a9bf358) will not change coverage.
Report is 1 commits behind head on develop.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #5550   +/-   ##
========================================
  Coverage    89.88%   89.88%           
========================================
  Files          179      179           
  Lines        15347    15347           
========================================
  Hits         13794    13794           
  Misses        1553     1553           

Flag	Coverage Δ
unittests	89.88% <ø> (ø)

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