* Update consume to accept new feature

* Move disconnect to callback

* Made use of exclusive queue

* Disconnect in message handlers

Since we are using exclusive queue, simply disconnect from it will
remove the queue

* Create a queuename variable based on the percent encoding of username.
* Pass 'queuename' attribute to add_user function.
* Create routing key based on 'queuename' rather then 'username'

add email field
if email not given, will:
    1. use username + domain
    2. use username (XIAS account)

Using rc_util functions to send request message
 and subscribe for confirmation right after that