Fix linting again

[fredbi]

Rescanned repo and fix linting issues.

[codecov]

Codecov Report

Merging #2329 into master will decrease coverage by 0.00%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master    #2329      +/-   ##
==========================================
- Coverage   81.44%   81.43%   -0.01%     
==========================================
  Files          50       50              
  Lines        8486     8487       +1     
==========================================
  Hits         6911     6911              
  Misses       1079     1079              
- Partials      496      497       +1     

Impacted Files	Coverage Δ
cmd/swagger/commands/mixin.go	80.64% <ø> (ø)
cmd/swagger/commands/serve.go	0.00% <ø> (ø)
cmd/swagger/commands/validate.go	100.00% <ø> (ø)
generator/model.go	84.72% <0.00%> (-0.18%)	⬇️
cmd/swagger/commands/diff.go	61.01% <100.00%> (+1.36%)	⬆️
cmd/swagger/commands/expand.go	87.50% <100.00%> (ø)
cmd/swagger/commands/generate/spec_go111.go	67.27% <100.00%> (ø)
codescan/schema.go	69.34% <100.00%> (ø)
generator/shared.go	89.55% <100.00%> (ø)
generator/template_repo.go	94.88% <100.00%> (ø)

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