Remove unnecessary inlineCallbacks and return deferred from _manager_from_config.
Remove unnecessary inlineCallbacks and return deferred from _manager_from_config.

harrissoerja/vumi,harrissoerja/vumi,TouK/vumi,vishwaprakashmishra/xmatrix,vishwaprakashmishra/xmatrix,harrissoerja/vumi,TouK/vumi,vishwaprakashmishra/xmatrix,TouK/vumi