Pass through non-JSON api errors

This fixes a small 🐛 where all errors seem to originate from the
gem. This is because we were catching, then re-raising, errors which
came from non-JSON api endpoints; effectively all parts of the
application.

This changes that behavior so that we are just a noop middleware for
non-JSON api endpoints. This means if they raise an error, we won't
catch it, and the error will appear as coming from it's original source.

Author: cupakromer

lib/kracken/json_api/public_exceptions.rb

@@ -7,9 +7,16 @@ def initialize(app)
       end
 
       def call(env)
-        app.call(env)
+        if JsonApi.has_path?(JsonApi::Request.new(env))
+          capture_error(env)
+        else
+          @app.call(env)
+        end
+      end
+
+      def capture_error(env)
+        @app.call(env)
       rescue Exception => exception
-        raise exception unless JsonApi.has_path?(JsonApi::Request.new(env))
         render_json_error(ExceptionWrapper.new(env, exception))
       end