Implement WAMP metadata registration configuration parameter

[yinzara]

The WAMP qflow library makes the general assumption that the WAMP client will be able to subscribe to some of the WAMP meta topics (i.e. wamp.subscription..) immediately after connection. In a secured environment where the WAMP router is using role based security, this assumption is not valid and causes errors upon connection.

These requests seem to only provide the client with information about available registered procedures. Since this functionality is not required in all version of WAMP I suggest this be some configuration parameter so that it can be disabled.

My fork contemplates this idea and I will update this issue as I work.