suppress events for unknown tasks #41

Job	Run time
setup-matrix	17s
test (ubuntu-latest, accounting)	2m 4s
test (ubuntu-latest, auth)	3m 12s
test (ubuntu-latest, b2b)	6m 32s
test (ubuntu-latest, dialog)	3m 13s
test (ubuntu-latest, permissions)	1m 32s
test (ubuntu-latest, presence)	1m 8s
test (ubuntu-latest, record-route)	55s
test (ubuntu-latest, registration)	5m 33s
test (ubuntu-latest, startup)	1m 41s
test (ubuntu-latest, stir-shaken)	5m 26s
test (ubuntu-latest, topology-hiding)	3m 42s
test (ubuntu-latest, uac-auth)	2m 57s
	38m 12s

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