swagger-php 2.0.11 added internal ref validation that break the whole thing

[AaronJan]

Since Definitions is outside of swagger-php, so all #ref in request schema will causing error.

After a little digging, I found two solutions:

1. Stay 2.0.10
2. Silence the Logger by doing this: \Swagger\Logger::getInstance()->log = function () {};

Obviously, these are not good solutions, I'll continue working on this.