Fix Bug: strategyUnify not work with close call

[leejanee]

Fix the bug that strategyUnify not work with close call

[codecov]

Codecov Report

Merging #1430 (021b2e9) into master (473164e) will increase coverage by 0.06%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master    #1430      +/-   ##
==========================================
+ Coverage   51.50%   51.57%   +0.06%     
==========================================
  Files          81       81              
  Lines        8013     8018       +5     
==========================================
+ Hits         4127     4135       +8     
+ Misses       3386     3384       -2     
+ Partials      500      499       -1     

Flag	Coverage Δ
unittests	51.57% <88.88%> (+0.06%)	⬆️

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Impacted Files	Coverage Δ
pkg/dsl/model/sets/utils.go	76.05% <88.88%> (+0.29%)	⬆️
...aits/traitdefinition/traitdefinition_controller.go	77.14% <0.00%> (+11.42%)	⬆️

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