Always include network

There is a check in compute.rb for network_type, if 'nova' we
include openstack-compute::network, however, network.rb is also
where we load neutron plugins, and it also has a check for 'nova'
or 'neutron', so it doesn't make sense to not include this with
compute. Otherwise, if you assign this recipe to your compute node
and have 'openstack.compute.network.service_type=neutron' you
won't get your plugins (like openvswitch or nicira or whatnot)

Change-Id: I587ca1db3c7c0635121096dc0bb54f7caa30c784
Merge "Always include network"