List all datacenters:
[
    [0]   <Fog::Compute::Vsphere::Datacenter
    id="datacenter-2",
    name="Lomaco (Figeac)",
    path=["Lomaco (Figeac)"],
    status="gray"
  >
]
Show datacenter DATACENTER:
/var/lib/gems/2.3.0/gems/fog-vsphere-1.6.0/lib/fog/vsphere/requests/compute/get_datacenter.rb:7:in `get_datacenter': Fog::Compute::Vsphere::NotFound (Fog::Compute::Vsphere::NotFound)
        from /var/lib/gems/2.3.0/gems/fog-vsphere-1.6.0/lib/fog/vsphere/models/compute/datacenters.rb:14:in `get'
        from test_cluster.rb:21:in `<main>'