Connect to condor after being launched by cloud scheduler

Add cloud_type to configure ephemeral storage depending on whether the
VM exosts on a nimbus, openstack or GCE cloud.  Add central_manager fact
to configure condor client to connect to the condor queue linked to the
cloud scheduler that booted the VM.  Add grid secutrity directory to
contain certificates for condor.  Retrieve these facts from files
written from cloud scheduler.  Update facts in the future to directly
interact with metadata server.

Changes:
   * new file:   condor/lib/facter/central_manager.rb
   * modified:   condor/manifests/client.pp
   * modified:   condor/templates/condor_config.local.csnode.erb
   * new file:   gce_node/lib/facter/cloud_type.rb
   * modified:   gce_node/manifests/grid_setup.pp
   * modified:   gce_node/manifests/init.pp