CIMI: Removed debug statements from AddressCollection
Core: Fixed Rabbit namespacing issues with Addresses (DTACLOUD-500)

NOTE: A sinatra-rabbit >= 1.15 is required to make this work and to
fix the bug.
Core: Change prefix for the Sinatra::Rabbit classes

Sinatra::Rabbit for CIMI is now CIMI::Rabbit
Sinatra::Rabbit for Deltacloud is now Deltacloud::CIMI