Test diagnostics #395

Job	Run time
diagnostic_aggregator on humble	4m 26s
diagnostic_aggregator on iron	4m 23s
diagnostic_aggregator on rolling	5m 7s
diagnostic_common_diagnostics on humble	5m 29s
diagnostic_common_diagnostics on iron	3m 55s
diagnostic_common_diagnostics on rolling	4m 5s
diagnostic_updater on humble	3m 34s
diagnostic_updater on iron	4m 39s
diagnostic_updater on rolling	3m 34s
self_test on humble	4m 55s
self_test on iron	3m 40s
self_test on rolling	3m 51s
	51m 38s

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