Test diagnostics #466

Job	Run time
diagnostic_aggregator on humble	3m 59s
diagnostic_aggregator on iron	4m 6s
diagnostic_aggregator on rolling	5m 3s
diagnostic_common_diagnostics on humble	4m 18s
diagnostic_common_diagnostics on iron	3m 25s
diagnostic_common_diagnostics on rolling	3m 58s
diagnostic_updater on humble	3m 17s
diagnostic_updater on iron	3m 55s
diagnostic_updater on rolling	3m 59s
self_test on humble	3m 54s
self_test on iron	4m 1s
self_test on rolling	4m 1s
	47m 56s

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