adding ConfigClassName() for loading classes
Send None as content of session start message since there is no actual content from the user.
loading of class for transport
ensure consumers are paused to allow us to set the qos
unpause does not need yield
Merge branch 'feature/issue-472-dispatchers-qos' into develop
Revert "adding ConfigClassName() for loading classes"

This reverts commit d37529a6ca1c391c847e19e73dd217825dee3702.
Might be useful some day but not for this feature.
allow TxRiakManager to set the transport class as well
stop using class names, now with tests
explicit unpacking for RiakClient
explicit unpacking for txriak manager
using test. as bucket_prefix
Merge branch 'feature/issue-469-riak-manager-transport-class' into develop
Merge branch 'develop' into feature/issue-457-endpoints-and-connectors

Conflicts:
	vumi/transports/base.py
Fix connector tests.