Using the hierarchy name instead of the flattened name for the parser ps

[STFleming]

This fix allows for the processing_system to be defined within a hierarchy. It fixes issue #1408

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.85%. Comparing base (93ddd21) to head (52d088c).
Report is 9 commits behind head on image_v3.1.

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Additional details and impacted files

@@             Coverage Diff             @@
##           image_v3.1    #1446   +/-   ##
===========================================
  Coverage       42.85%   42.85%           
===========================================
  Files              30       30           
  Lines            4835     4835           
  Branches          868      868           
===========================================
  Hits             2072     2072           
  Misses           2704     2704           
  Partials           59       59           

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