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

This reverts commit 13860f75.

corrected percona variables: mysql_cluster_server as a String andwsrep_node_address rely on getvar instead on facts[]

connectors.pp modified in order to be compliant with the modification of the iaas::role::endpoint::coordination variable in common.yaml

Private network(s) and router creation commented due to a not working enviroment when configuring test tenant.
The problem comes when controller-node and network-node are separed.