Add rabbit ssl parameters

Reasons:
- We must be able to active and configure ssl for RabbitMq

Changes:
- Add rabbit_use_ssl option
- Add kombu_ssl_ca_certs option
- Add kombu_ssl_certfile option
- Add kombu_ssl_keyfile option
- Add kombu_ssl_version option

Change-Id: I504e968c7be929b0f040fd50e89a0de0ea3e6860
Merge "Add rabbit ssl parameters"