Add integration tests for Scope validation

[nimsara66]

Purpose

Validate scopes for REST APIs and WebSocket APIs with both path parameter and wildcard resources/ topics.

Issue

wso2/api-manager#3307

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 13.25%. Comparing base (68d1361) to head (5f16ebe).
Report is 53 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13635      +/-   ##
============================================
- Coverage     18.58%   13.25%   -5.33%     
+ Complexity      952      745     -207     
============================================
  Files           261      263       +2     
  Lines         12084    12160      +76     
  Branches       1266     1274       +8     
============================================
- Hits           2246     1612     -634     
- Misses         9819    10532     +713     
+ Partials         19       16       -3     

Flag	Coverage Δ
integration_tests	13.25% <ø> (-5.33%)	⬇️

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