add back sideinput examples #17

Job	Run time
Build and Push Images (map-even-odd)	1m 12s
Build and Push Images (map-flatmap)	1m 13s
Build and Push Images (map-forward-message)	1m 13s
Build and Push Images (map-retry)	1m 19s
Build and Push Images (map-tickgen)	1m 40s
Build and Push Images (map-flatmap-stream)	1m 13s
Build and Push Images (reduce-counter)	1m 5s
Build and Push Images (reduce-sum)	1m 19s
Build and Push Images (reduce-stream-counter)	1m 4s
Build and Push Images (reduce-stream-sum)	1m 15s
Build and Push Images (session-counter)	1m 17s
Build and Push Images (sideinput-example)	1m 8s
Build and Push Images (udf-sideinput-example)	1m 16s
Build and Push Images (sink-log)	1m 7s
Build and Push Images (source-simple-source)	1m 17s
Build and Push Images (mapt-assign-event-time)	1m 19s
Build and Push Images (mapt-event-time-filter)	1m 13s
	21m 10s

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