Add gluster::client to nova_network::compute
Fix firewall for gluster storage backend
Merge pull request #51 from jistr/gluster_pt3

Gluster pt3
parameterize whether we are using gluster in compute manifests

also, glance_backend_gluster -> cinder_backend_gluster since for now we are
more focused on cinder.
Merge pull request #52 from cwolferh/gwork4

parameterize whether we are using gluster in compute manifests