Return consumer from _set_prefetch_count so that _setup_consumer returns the consumer again. Add helper method for setting default endpoint handlers. Add TODO for the case where there is no default endpoint handler.
Return consumer from _set_prefetch_count so that _setup_consumer returns the consumer again. Add helper method for setting default endpoint handlers. Add TODO for the case where there is no default endpoint handler.

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