Multiple issues: 1. dnsmasq integration (to review); 2. use_neutron variable added in nova.conf (controller); 3. MTU variable (to review); 4. use apt::pin instead of file resource to select CEPH repo (Hammer)

Workaronds: 1. OVS bridges don't start after creation as well as after reboot (ovs 2.5.0); 2. MTU variable has been moved to be correctly set

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

moved xinetd dependency in percona module in order to permit the correct percona class deployment (before users, tables and grant configuration)