Update rspec and stop using mongoid beta
Convert specs to RSpec 3.0.2 syntax with Transpec

This conversion is done by Transpec 2.3.3 with the following command:
    transpec

* 3 conversions
    from: obj.stub(:message => value)
      to: allow(obj).to receive_messages(:message => value)

* 1 conversion
    from: obj.stub_chain(:message1, :message2)
      to: allow(obj).to receive_message_chain(:message1, :message2)

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Use ruby 2.1 as default version
update dependencies