Add initialize to amqp connection_factory (#922) #4983

Job	Run time
Format check	14s
Lint check	1m 5s
Lint javascript	15s
Lint OpenAPI	14s
Spec	1m 59s
Spec OS X	2m 37s
Compile LavinMQ	1m 3s
Spec FreeBSD	2m 21s
Filters for frontend specs	4s
Bunny client test	2m 54s
RabbitMQ java client test	5m 34s
RabbitMQ HTTP API Go client test	1m 1s
Test in release mode	43s
RabbitMQ HTTP API Ruby client test	47s
Frontend specs	0s
	20m 51s

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