[API] Eliminate references to API keys

[matt8100]

• Remove uuid-apikey as a dependency
• Files that use API keys:
  • POST-register route and test
  • POST-new route and test
  • models/device schema
  • test/data_new_test
  • test/data_getData_test
  • test/device_info_test
  • test/device_unregister_test