Regenerate config.rst to reflect importance changes in rest-utils.
Regenerate config.rst to reflect importance changes in rest-utils.

scbrady/kafka-rest,uber/kafka-rest,wgpshashank/kafka-rest,pbhalesain/kafka-rest,pbhalesain/kafka-rest,imdark/kafka-rest,scbrady/kafka-rest,keedio/kafka-rest,uber/kafka-rest,rolmovel/kafka-rest,miguno/kafka-rest,imdark/kafka-rest,miguno/kafka-rest,wgpshashank/kafka-rest,keedio/kafka-rest,rolmovel/kafka-rest,fharenheit/kafka-rest,fharenheit/kafka-rest