[ISSUE #4581] add integrated test for k8s ingress controller

[JooKS-me]

About #4581

Make sure that:

• You have read the contribution guidelines.
• You submit test cases (unit or integration tests) that back your changes.
• Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Merging #4820 (5d4d6ed) into master (defdde8) will increase coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #4820      +/-   ##
============================================
+ Coverage     64.56%   64.60%   +0.04%     
+ Complexity     8179     8176       -3     
============================================
  Files          1147     1147              
  Lines         33805    33805              
  Branches       3016     3016              
============================================
+ Hits          21826    21840      +14     
+ Misses        10256    10242      -14     
  Partials       1723     1723              

see 4 files with indirect coverage changes

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