Update RabbitMQ script

Follow MCollective guide for RabbiMQ middleware.
Update SSL keys fixtures
Fxi setup.py script
Add load_rsa_key util
Config object is able to load serializer itself
Rename simple action example

Since it is nothing related to stomp.
Client example uses client.cfg

Instead of server.cfg
ammend to 56a9bbcf83bd0f5e5c0903a45f4a22078ee8c44a
Add SSL security provider