Issue-293: make override part names absolute

[martinweismann]

Fixes #293

[codecov]

Codecov Report

Merging #294 (802675b) into develop (2a733de) will increase coverage by 0.00%.
The diff coverage is 80.00%.

@@           Coverage Diff            @@
##           develop     #294   +/-   ##
========================================
  Coverage    71.46%   71.46%           
========================================
  Files          419      419           
  Lines        23965    23967    +2     
========================================
+ Hits         17127    17129    +2     
  Misses        6838     6838           

Impacted Files	Coverage Δ
...ce/Common/OPC/NMR_OpcPackageContentTypesReader.cpp	81.42% <66.66%> (+0.13%)	⬆️
Source/Common/OPC/NMR_OpcPackageWriter.cpp	93.00% <100.00%> (+0.07%)	⬆️

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