Get back to using $VERSION #27

Job	Run time
build	5m 23s
clippy	2m 13s
tests (boost-manager)	2m 38s
fmt	58s
tests (file-store)	2m 14s
tests (ingest)	2m 20s
tests (iot-config)	3m 28s
tests (iot-packet-verifier)	3m 46s
tests (iot-verifier)	2m 59s
tests (mobile-config)	2m 24s
tests (mobile-packet-verifier)	2m 8s
tests (mobile-verifier)	2m 31s
tests (reward-scheduler)	1m 50s
tests (task-manager)	2m 9s
	37m 1s

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