adds MPL v2 license file
adds MPL v2 license file

adrianzhang/RabbitMQSimulator,Stackato-Apps/RabbitMQSimulator,RabbitMQSimulator/RabbitMQSimulator,adrianzhang/RabbitMQSimulator,Stackato-Apps/RabbitMQSimulator,RabbitMQSimulator/RabbitMQSimulator