swagger tag values populated by provided tags, not endpoint name

[codecov-io]

Codecov Report

Merging #965 into master will decrease coverage by 0.1%. The diff coverage is 50.0%.

@@           Coverage Diff            @@
##           master    #965     +/-   ##
========================================
- Coverage    94.6%   94.6%   -0.0%     
========================================
  Files         315     315             
  Lines       27890   27894      +4     
========================================
+ Hits        26375   26377      +2     
- Misses       1515    1517      +2     

Impacted Files	Coverage Δ
guillotina/contrib/swagger/services.py	91.9% <50.0%> (-1.4%)	:arrow_down:

[svx]

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