Support new location source field on wifi heartbeats (#833) #256

Job	Run time
fmt	12s
build	4m 49s
clippy	1m 53s
tests (coverage-map)	1m 42s
tests (coverage-point-calculator)	1m 28s
tests (file-store)	2m 8s
tests (ingest)	1m 49s
tests (mobile-packet-verifier)	2m 30s
tests (reward-scheduler)	53s
tests (task-manager)	1m 1s
tests-postgres (boost-manager)	3m 22s
tests-postgres (iot-config)	2m 38s
tests-postgres (iot-packet-verifier)	3m 55s
tests-postgres (iot-verifier)	2m 33s
tests-postgres (mobile-config)	2m 32s
tests-postgres (mobile-verifier)	2m 34s
build-release	14m 45s
	50m 44s

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