Update dependencies

[tgianos]

• Update OkHTTP to version matching internal recommendation
• Update SpringFox from 2.x to 3.x
• Move Swagger/SpringFox into its own module that can be ignored or taken as needed

[coveralls]

Coverage decreased (-0.002%) to 93.912% when pulling 94e2c3ab873964ece27a7db14e25d3a6eacf3c1a on tgianos:updateOkHttp3 into f6273cc8a372fd0e419e7782cba64bf44dec5d41 on Netflix:master.

[codecov[bot]]

Codecov Report

Merging #1090 (94e2c3a) into master (f6273cc) will decrease coverage by 0.00%. The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1090      +/-   ##
============================================
- Coverage     90.88%   90.88%   -0.01%     
+ Complexity     3649     3646       -3     
============================================
  Files           452      451       -1     
  Lines         14102    14098       -4     
  Branches        986      986              
============================================
- Hits          12817    12813       -4     
  Misses          850      850              
  Partials        435      435              

Impacted Files	Coverage Δ	Complexity Δ
...spring/autoconfigure/SwaggerAutoConfiguration.java	100.00% <ø> (ø)	2.00 <0.00> (?)

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