This reverts commit 3cce99c7.

* Add return value to update_state

* Add timeout decorator

* Add 30 sec timeout for check and update state

* Update user state when all tasks are done

* Update delete user script

Remove user state records from db

* Add timeout to rabbit config

* User timeout variable for check and update state

* Update timeout variable name

* 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

* Remove some variables from the RCRMQ class

The previous design was base on these assumptions:
  RCRMQ instance only need to do either publish or consume
  RCRMQ instance only need to interact with one single queue

However, in order to perform RPC-like call, an instance will need to do both
publish and consume. In addition, publish and consume are not necessary
to the same queue. So, save queue name as single variable inside the
instance is not viable anymore.

* Add exclusive queue support

* Check connection before bind queue

* Add auto-generate queue support

* Make bind queue optional when start consume

* Add properties support when publish msg

* Add user_state agent

* Add check_state in rc_util

* Add update_state in rc_util

* Add no-account when no hit in db

* Move valid state into config file

* Add user auth example

* Add migration flag

During the first phase, e.g. not all of users are in the user_state DB,
  using alternative method, getnet passwd, to see if user is an existing
  user.

* Update user state when using alternative lookup

* Allow no reply-to message to the user_state

* Add path for venv packages

* Fix typo

* Remove sys path to venv

* Fix condition for migration phase code

* Drop output from subprocess

* Move user_auth to top level

* Add default state as variable

* Add a function to percent encode username
* Add parameter 'queuename' to add_user function.
* Add parameter 'queuename' to consume function.

It acted like task manager when first design it.
Now we have proper task manager, update it.
The default behavior will be a caller waiting to complete msg

Now consume can take routing key as argument

user should explicitly call disconnect
Modify README regarding explicity disconnect call

Change to only one exchange, so there's only one instance, rc_rmq

Remove trailing whitespace
Add space between '+'

After standup meeting, change the exchange name to Register

including add_account and consume function