[FIX]Deduplicate dcm2niix output

[mauriliogenovese]

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fix for #3579

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 63.18%. Comparing base (682abac) to head (39b3a2c). Report is 70 commits behind head on master.

:exclamation: Current head 39b3a2c differs from pull request most recent head 45e8076. Consider uploading reports for the commit 45e8076 to get more accurate results

Files	Patch %	Lines
nipype/interfaces/dcm2nii.py	0.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3610      +/-   ##
==========================================
- Coverage   63.18%   63.18%   -0.01%     
==========================================
  Files         308      308              
  Lines       40809    40810       +1     
  Branches     5652     5652              
==========================================
  Hits        25784    25784              
- Misses      14013    14014       +1     
  Partials     1012     1012              

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[effigies]

Apologies for the delay. Is it possible to write a test that reproduces the issue?

[mauriliogenovese]

I cannot write a test without providing images from a subject and I don't have a public dataset. Anyway the pull request simply removes any duplicate entry from the final file list, so it would be fine in this and any other similar case.