[release] drop resource attributes that are nil
Merge pull request #110 from portertech/release

[release] drop resource attributes that are nil
[release] be sure to set a rabbitmq erlang cookie for clustering
[release] use rabbitmq mgmt_console recipe
Merge pull request #111 from portertech/release

RabbitMQ clustering
[release] remove rabbitmq clustering, immediate service restart
Merge pull request #112 from portertech/release

[release] remove rabbitmq clustering, immediate service restart