Use SetControllerReference from controllerutil

[troy0820]

This is for testing purposes

[schristoff]

This is part of #248 that will close #54

[codecov]

Codecov Report

Merging #258 (85d24a5) into main (433e481) will decrease coverage by 4.15%.
The diff coverage is 15.38%.

@@            Coverage Diff             @@
##             main     #258      +/-   ##
==========================================
- Coverage   71.82%   67.67%   -4.15%     
==========================================
  Files          14       14              
  Lines        2165     2147      -18     
==========================================
- Hits         1555     1453     -102     
- Misses        477      547      +70     
- Partials      133      147      +14     

Flag	Coverage Δ
unittests	67.67% <15.38%> (-4.15%)	⬇️

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

Files Changed	Coverage Δ
controllers/agentaction_controller.go	80.60% <0.00%> (-1.49%)	⬇️
controllers/agentconfig_controller.go	58.78% <0.00%> (-3.63%)	⬇️
controllers/installation_controller.go	60.22% <0.00%> (-7.92%)	⬇️
controllers/credentialset_controller.go	58.04% <33.33%> (-12.18%)	⬇️
controllers/parameterset_controller.go	58.28% <33.33%> (-12.11%)	⬇️

... and 1 file with indirect coverage changes

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[schristoff]

🎉 Happy to see this