[server][AMQPConsumer] Use amqp_connection_info instead of SoupURI

It is better that AMQPConsumer doesn't depend on libsoup because
AMQPConsumer doesn't use HTTP.
Merge pull request #384 from project-hatohol/hapi-json-use-amqp-connection-info

[server][AMQPConsumer] Use amqp_connection_info instead of SoupURI