Enable RabbitMQ service and allow integration test.

Updated tests for latest Rabbit.

Use records in the tests.

Bumped the version to 0.4.0 due to significance of rebar3 change

Bumped to version 0.3.1.

Bumped to version 0.3.0.

For use with LFE 0.9, lfetool 1.4.x, and RabbitMQ 3.3.5.

For use with LFE 0.8, lfetool 1.3.x, and RabbitMQ 3.3.5.