[REF] Stop using deprecated import internally

[asmacdo]

Summary

Remove internal imports of deprecated nipype.LooseVersion for looseversion.LooseVersion

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (2086876) 63.34% compared to head (242b572) 63.34%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3561   +/-   ##
=======================================
  Coverage   63.34%   63.34%           
=======================================
  Files         309      309           
  Lines       40900    40904    +4     
  Branches     5381     5381           
=======================================
+ Hits        25907    25911    +4     
  Misses      13985    13985           
  Partials     1008     1008           

Impacted Files	Coverage Δ
nipype/__init__.py	53.19% <ø> (ø)
nipype/interfaces/afni/base.py	64.34% <100.00%> (+0.27%)	⬆️
nipype/interfaces/base/core.py	85.46% <100.00%> (+0.02%)	⬆️
nipype/interfaces/freesurfer/base.py	48.38% <100.00%> (ø)
nipype/interfaces/freesurfer/preprocess.py	64.42% <100.00%> (+0.03%)	⬆️
nipype/interfaces/fsl/model.py	49.11% <100.00%> (ø)
nipype/interfaces/fsl/preprocess.py	61.04% <100.00%> (ø)
nipype/interfaces/image.py	73.41% <100.00%> (ø)
nipype/interfaces/mrtrix3/base.py	59.67% <100.00%> (+0.66%)	⬆️

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