Added hierarchy definition. (#255)
Added common facts file for all nodes. (#255)
Added value for dashboard_api hostname for all machines. (#255)

Wherever we provision the API to run, Puppet will know how to correctly
get the external hostname from Hiera.
Added support for setting up hiera for all the nodes immediately after bootstrap. (#255)
Merge pull request #257 from ami-lab/f/#255-provision-dashboard

F/#255 provision dashboard