Although I know this not follows best practices, this huge commit
reorganizes and defines the mail functionality for the rest of the
plugin refactor work:
* Renames and moves tasks to puppet/manifests/midonet-* names
* Stops, reconfigures and restarts Neutron
* Makes DHCP and metadata work
* Improves documentation
Change-Id: I6d5ed20ba212a089b808c09fe50a8aedaab74721
Rely on midonet-midonet puppet module to deploy ZooKeeper and Cassandra
services.
Previous zookeeper and cassandra manifests have been deleted.
New NSDB (No State DataBase) role has to be created on the Fuel roles,
as well as its corresponding group. Way to do it is informed on the
`doc/content/user-guide.rst` file
Change-Id: Iac949876b20e1bfe761b27269b3c4414cb768b17