Remove illegal reflective access warning

[chamilaadhi]

Fix for wso2/api-manager#2475

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.30%. Comparing base (e7b5c1f) to head (ba7d732).
Report is 57 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #13406      +/-   ##
============================================
- Coverage     24.31%   24.30%   -0.02%     
+ Complexity     1242     1240       -2     
============================================
  Files           254      254              
  Lines         11489    11489              
  Branches       1200     1200              
============================================
- Hits           2794     2792       -2     
- Misses         8668     8670       +2     
  Partials         27       27              

Flag	Coverage Δ
integration_tests	24.30% <ø> (-0.02%)	⬇️

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