Ensure that getUserDef / getRoleDef is deepcopied (SYN-8627)

[vEpiphyte]

These API results values should be unique and changes to them should not reflect back on any in-memory structures.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.40%. Comparing base (07e8f45) to head (be21ba4).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4084      +/-   ##
==========================================
- Coverage   96.47%   96.40%   -0.08%     
==========================================
  Files         256      256              
  Lines       59807    59809       +2     
==========================================
- Hits        57700    57660      -40     
- Misses       2107     2149      +42     

Flag	Coverage Δ
linux	96.40% <100.00%> (+<0.01%)	⬆️
linux_replay	?

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