Add test case for tenant sync feature - IS side tenant Creation

[chamilaadhi]

Integration test case for wso2/api-manager#4066

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 12.77%. Comparing base (5cbde3f) to head (001cf23).
⚠️ Report is 96 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13805      +/-   ##
============================================
+ Coverage     11.64%   12.77%   +1.13%     
+ Complexity      733      728       -5     
============================================
  Files           295      295              
  Lines         13994    14089      +95     
  Branches       1485     1504      +19     
============================================
+ Hits           1629     1800     +171     
+ Misses        12349    12263      -86     
- Partials         16       26      +10     

Flag	Coverage Δ
integration_tests	12.77% <ø> (+1.13%)	⬆️

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