Radios that earn 0 rewards should be removed from coverage map #597

Job	Run time
clippy	1m 52s
build	2m 27s
fmt	3s
tests (coverage-point-calculator)	1m 14s
tests (ingest)	2m 12s
tests (coverage-map)	1m 35s
tests (reward-scheduler)	59s
tests (task-manager)	1m 5s
tests-postgres (boost-manager)	2m 23s
tests-postgres (file-store)	2m 25s
tests-postgres (iot-config)	2m 36s
tests-postgres (iot-packet-verifier)	3m 36s
tests-postgres (mobile-config)	2m 25s
tests-postgres (iot-verifier)	2m 30s
tests-postgres (mobile-packet-verifier)	2m 50s
tests-postgres (mobile-verifier)	2m 46s
build-release	0s
	32m 58s

Provide feedback