update integration test

[suchen-sci]

work in progress, add more test

[codecov-commenter]

Codecov Report

Merging #630 (be31cdc) into pipeline (5596d7c) will increase coverage by 0.15%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           pipeline     #630      +/-   ##
============================================
+ Coverage     72.14%   72.29%   +0.15%     
============================================
  Files            96       96              
  Lines         10822    10805      -17     
============================================
+ Hits           7807     7811       +4     
+ Misses         2535     2514      -21     
  Partials        480      480              

Impacted Files	Coverage Δ
pkg/filters/certextractor/certextractor.go	85.91% <ø> (-1.59%)	⬇️
pkg/filters/connectcontrol/connectcontrol.go	90.90% <ø> (-0.12%)	⬇️
pkg/filters/corsadaptor/corsadaptor.go	90.62% <ø> (-0.15%)	⬇️
pkg/filters/fallback/fallback.go	67.50% <ø> (-0.80%)	⬇️
pkg/filters/headerlookup/headerlookup.go	84.82% <ø> (-0.11%)	⬇️
pkg/filters/headertojson/headertojson.go	66.99% <ø> (-0.32%)	⬇️
pkg/filters/httpbuilder/httprequestbuilder.go	40.62% <ø> (+0.62%)	⬆️
pkg/filters/httpbuilder/httpresponsebuilder.go	42.85% <ø> (+0.75%)	⬆️
pkg/filters/kafka/kafka.go	53.77% <ø> (+0.50%)	⬆️
pkg/filters/kafkabackend/kafka.go	72.00% <ø> (+11.47%)	⬆️
... and 13 more

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