test: fix flaky debugModeExpiresBasedOnServerTime test (#165) #442

Job	Run time
test-packaging	4m 49s
test-platforms-and-versions (ubuntu-latest, 17)	3m 30s
test-platforms-and-versions (ubuntu-latest, 19)	3m 34s
test-platforms-and-versions (ubuntu-latest, 11)	4m 0s
test-platforms-and-versions (ubuntu-latest, 8)	3m 56s
test-contract-tests	4m 45s
	24m 34s

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