Integration test - API-KEY authentication support for web socket APIs

[thisaltennakoon]

Fix wso2/api-manager#2187

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 23.23%. Comparing base (8b71bbf) to head (3fa3f8e).
Report is 5 commits behind head on master.

❗ Current head 3fa3f8e differs from pull request most recent head b5e81c4. Consider uploading reports for the commit b5e81c4 to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13278      +/-   ##
============================================
+ Coverage     20.24%   23.23%   +2.98%     
- Complexity     1030     1172     +142     
============================================
  Files           254      254              
  Lines         11489    11489              
  Branches       1200     1200              
============================================
+ Hits           2326     2669     +343     
+ Misses         9134     8794     -340     
+ Partials         29       26       -3     

Flag	Coverage Δ
integration_tests	23.23% <ø> (+2.98%)	⬆️

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