Queue should expire TTL milliseconds after last consumer left #4993

Job	Run time
Lint check	1m 2s
Format check	11s
Lint javascript	15s
Lint OpenAPI	16s
Compile LavinMQ	59s
Spec FreeBSD	2m 25s
Filters for frontend specs	4s
Spec	1m 56s
Spec OS X	2m 14s
Bunny client test	2m 29s
RabbitMQ HTTP API Go client test	58s
Test in release mode	16s
RabbitMQ java client test	5m 3s
RabbitMQ HTTP API Ruby client test	52s
Frontend specs	0s
	19m 0s

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