Prevent lavinmq from freezing when closing consumers and channels (#947) #5085

Job	Run time
Format check	13s
Compile LavinMQ	1m 8s
Spec FreeBSD	2m 24s
Lint check	1m 1s
Lint javascript	15s
Lint OpenAPI	20s
Filters for frontend specs	2s
Spec	2m 18s
Spec OS X	2m 28s
RabbitMQ java client test	5m 5s
Bunny client test	2m 36s
RabbitMQ HTTP API Go client test	58s
Test in release mode	17s
RabbitMQ HTTP API Ruby client test	1m 10s
Frontend specs	0s
	20m 15s

Provide feedback