Test shuffle.

	modified:   TODO
	renamed:    t/00_utils/01_context.t -> t/00_utils/context.t
	renamed:    t/01_component/02_pubsub.t -> t/01_component/pub_sub.t
	renamed:    t/01_component/01_repreq.t -> t/01_component/rep_req.t
	renamed:    t/02_subclass/02_publisher_subscriber.t -> t/02_subclass/publisher_subscriber.t
	renamed:    t/02_subclass/01_requestor_replier.t -> t/02_subclass/requestor_replier.t