added rabbit_package_gpg_key parameter, which permit to specify gpg key source. Default changed in https://www.rabbitmq.com/rabbitmq-release-signing-key.asc

New role added: iaasbase. Used to make a common configuration starting point to enable multiple roles in the same node

unified params.pp and minor changes in rhmk parameters (all input parameters are now explicit in class declaration)

This reverts commit 13860f75.

added possibility of changing ip addresses of single database node. Requiring percona module > 1.0.0

insered a variable (default on classic hostname) in rhmk role for changing hostname in /etc/rabbitmq/rabbitmq-env.conf