Don't ignore defaults when updating request params
Don't ignore defaults when updating request params

If the default params aren't at the bottom of the param order, then the middleware
will think that the value has changed and end up setting it to the top of the stack.
Making it appear that default parameters were passed as JSON.
iron-bound-designs/wp-rest-api-schema-validator,iron-bound-designs/wp-rest-api-schema-validator