Test diagnostics #417

Job	Run time
diagnostic_aggregator on humble	4m 20s
diagnostic_aggregator on iron	5m 44s
diagnostic_aggregator on rolling	3m 43s
diagnostic_common_diagnostics on humble	5m 9s
diagnostic_common_diagnostics on iron	3m 53s
diagnostic_common_diagnostics on rolling	3m 52s
diagnostic_updater on humble	5m 13s
diagnostic_updater on iron	3m 34s
diagnostic_updater on rolling	4m 20s
self_test on humble	3m 36s
self_test on iron	5m 9s
self_test on rolling	5m 12s
	53m 45s

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