Test diagnostics #416

Job	Run time
diagnostic_aggregator on humble	4m 57s
diagnostic_aggregator on iron	4m 23s
diagnostic_aggregator on rolling	4m 26s
diagnostic_common_diagnostics on humble	4m 42s
diagnostic_common_diagnostics on iron	3m 52s
diagnostic_common_diagnostics on rolling	3m 37s
diagnostic_updater on humble	4m 10s
diagnostic_updater on iron	4m 6s
diagnostic_updater on rolling	4m 41s
self_test on humble	4m 42s
self_test on iron	5m 15s
self_test on rolling	5m 59s
	54m 50s

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