Iptables implementation into hiera data.

- Added into maestro.yaml range of ports needed for maestro
implementation (puppet, http, https, salt, etc)
- Removing the implementation of iptables from the maestro.pp &
openstack.pp
- Added new class manage_servers

Change-Id: Iaf5e07147748c202798a1cc8b2c29048d3b897e5