Extend WampSessionClient ctor with authenticator param

Add overloaded CreateChannel method to IWampChannelFactory
Add JSON and MsgPack channels creation methods to DefaultWampChannelFactory

Forgot to save

Forgot to save auth sample project file and solution changes

Default authenticator

Implements default authenticator
Remove TODO
extra param usage sample

remove DefaultWampClientAutenticator.cs

remove DefaultWampClientAutenticator.cs