Add additional information to servers output.
Add additional information to servers output.

 * Improves cloud debugability, by letting admins see on which host a
   server has been launched
 * Addresses blueprint optional-host-and-admin-information
 * Add test
 * Rebase to master, fix tests accordingly

Change-Id: Iba173ca3b1ead716e274f1d287cebbc7961d8a93

n0ano/ganttclient