Try to always require newrelic_rpm

lib/travis/api/app/base.rb

@@ -1,6 +1,7 @@
 require 'travis/api/app'
 require 'sinatra/base'
 require 'new_relic/agent/instrumentation/rack'
+require 'newrelic_rpm'
 
 class Travis::Api::App
   # Superclass for any endpoint and middleware.
@@ -8,10 +9,6 @@ class Travis::Api::App
   class Base < Sinatra::Base
     register Extensions::SmartConstants
 
-    configure :production do
-      require 'newrelic_rpm'
-    end
-
     error NotImplementedError do
       content_type :txt
       status 501