Added neutron

* Used upstream puppet-neutron
* added tests
* Moved neutron from contrail lb to openstack lb
  This is done because openstack lb uses consul service discovery.
  Only place the contrail+neutron code add consul service is neutron.
  All contrail services are not registered on consul at this point of time.
  This is WIP along with the code for multi-node contrail.
* database/connection is not required for neutron with contrail plugin; so removing it.
* Added spec tests