Sync'ed up expectations in tests with updated go-openapi/spec

[fredbi]

• contributes Allow empty string for authorizationUrl in security definition go-swagger/go-swagger#1775
• contributes swagger validate fails on responses with description field go-swagger/go-swagger#2429

[codecov]

Codecov Report

Merging #62 (5badfb4) into master (abf9658) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #62   +/-   ##
=======================================
  Coverage   90.52%   90.52%           
=======================================
  Files           7        7           
  Lines        1551     1551           
=======================================
  Hits         1404     1404           
  Misses         96       96           
  Partials       51       51           

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