Sync release leadership on stop #4770

Job	Run time
Compile LavinMQ	1m 0s
Format check	11s
Spec FreeBSD	2m 38s
Lint javascript	16s
Lint OpenAPI	13s
Filters for frontend specs	5s
Lint check	59s
Spec	2m 1s
Spec OS X	2m 0s
Test in release mode	16s
Bunny client test	2m 29s
RabbitMQ HTTP API Go client test	1m 3s
RabbitMQ java client test	5m 5s
RabbitMQ HTTP API Ruby client test	50s
Frontend specs	0s
	19m 6s

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