Test diagnostics #391

Job	Run time
diagnostic_aggregator on humble	4m 32s
diagnostic_aggregator on iron	5m 21s
diagnostic_aggregator on rolling	4m 50s
diagnostic_common_diagnostics on humble	4m 25s
diagnostic_common_diagnostics on iron	5m 4s
diagnostic_common_diagnostics on rolling	4m 11s
diagnostic_updater on humble	4m 25s
diagnostic_updater on iron	4m 46s
diagnostic_updater on rolling	4m 26s
self_test on humble	4m 40s
self_test on iron	5m 34s
self_test on rolling	4m 13s
	56m 27s

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