Clash with JSONAPI Library

[Jade Alejandra Ornelas]

A module called JsonApi in the file web/json_api.ex is clashing with JSONAPI in case insensitive FS.

14:45:27.182 [error] Loading of /otp-app/_build/test/lib/exq_ui/ebin/Elixir.JSONAPI.beam failed: :badfile

14:45:27.182 [error] beam/beam_load.c(1428): Error loading module 'Elixir.JSONAPI':
  module name in object code is Elixir.JsonApi

[Alex Kira]

Thanks for the PR! 👍