Updates for Sensu 0.14 and additional RabbitMQ settings

This pull request includes the following changes:

1. Creates separate json config files from templates which was changed after Sensu 0.11.
1. Adds ability to enable/disable use of SSL with RabbitMQ: `sensu_server_rabbitmq_ssl`
1. Adds ability to specify RabbitMQ vhost: `sensu_server_rabbitmq_vhost`
1. Fixes an error that can occur with init script