Get openstack version from hiera

Change-Id: Idfae6a372bb6309f3c348b36288a7cb71453aa00
Support extra options on compute nodes

Change-Id: Ie8aeb61694ca6d8776dd684650664c5a42d1fa09
More config changes for grizzly

Change-Id: I2fb56c80a3fa6505439af26561f45ae9966e346e