DVO-141: remove global validationengine variable

[tremes]

No description provided.

[openshift-ci-robot]

@tremes: This pull request references DVO-141 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the task to target the "4.15.0" version, but no target version was set.

In response to this:

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[codecov-commenter]

Codecov Report

Merging #274 (928e301) into master (bfb72f6) will increase coverage by 3.22%.
Report is 1 commits behind head on master.
The diff coverage is 78.02%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #274      +/-   ##
==========================================
+ Coverage   40.79%   44.02%   +3.22%     
==========================================
  Files          25       25              
  Lines        1157     1129      -28     
==========================================
+ Hits          472      497      +25     
+ Misses        650      600      -50     
+ Partials       35       32       -3     

Files Changed	Coverage Δ
main.go	0.00% <0.00%> (ø)
pkg/validations/base.go	100.00% <ø> (+20.22%)	⬆️
pkg/validations/utils.go	70.21% <ø> (+38.06%)	⬆️
pkg/controller/generic_reconciler.go	62.37% <33.33%> (+0.19%)	⬆️
pkg/validations/validation_engine.go	83.12% <85.00%> (+23.50%)	⬆️

... and 2 files with indirect coverage changes

[ncaak]

/lgtm

[openshift-ci]

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This pull-request has been approved by: ncaak, tremes

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