add deprecation comments (#650) #1267

Job	Run time
setup	11s
validate-example (actor)	2m 14s
validate-example (configuration)	1m 25s
validate-example (crypto)	1m 22s
validate-example (dist-scheduler)	51s
validate-example (grpc-service)	2m 6s
validate-example (hello-world)	1m 7s
validate-example (pubsub)	1m 52s
validate-example (streamsub)	54s
validate-example (service)	2m 1s
validate-example (socket)	47s
validate-example (workflow)	1m 27s
validate-example (workflow-parallel)	58s
	17m 15s

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