Test diagnostics #459

Job	Run time
diagnostic_aggregator on humble	3m 32s
diagnostic_aggregator on iron	3m 45s
diagnostic_aggregator on rolling	3m 25s
diagnostic_common_diagnostics on humble	4m 24s
diagnostic_common_diagnostics on iron	4m 11s
diagnostic_common_diagnostics on rolling	3m 1s
diagnostic_updater on humble	3m 0s
diagnostic_updater on iron	3m 7s
diagnostic_updater on rolling	3m 56s
self_test on humble	4m 29s
self_test on iron	3m 50s
self_test on rolling	3m 57s
	44m 37s

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