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Start integration servers again when another process takes their port #2005

Job	Run time
test (ubuntu-latest, 2/2)	1m 43s
test (ubuntu-latest, unit)	2m 28s
build and typecheck (ubuntu-latest)	1m 29s
test (ubuntu-latest, 1/2)	1m 47s
live-e2e	0s
done	3s
	7m 30s