Test diagnostics #484

Job	Run time
diagnostic_aggregator on humble	3m 57s
diagnostic_aggregator on iron	4m 38s
diagnostic_aggregator on rolling	4m 2s
diagnostic_common_diagnostics on humble	3m 29s
diagnostic_common_diagnostics on iron	3m 18s
diagnostic_common_diagnostics on rolling	3m 23s
diagnostic_updater on humble	3m 47s
diagnostic_updater on iron	3m 55s
diagnostic_updater on rolling	3m 15s
self_test on humble	3m 18s
self_test on iron	5m 2s
self_test on rolling	4m 0s
	46m 4s

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