Convert cells nova config to hiera

Change-Id: Id76bdaea2266bdb00e28f19ab9984ddbd3d100f2
hiera for api server

Change-Id: I348869d26e835271e87a0d04c521e6b7a7d7fc21
Fix variable selection due to ruby oddness

Change-Id: I20c98d56e36fa937bdd844c89a89c2d8e8359212
More fixes for hiera

Change-Id: I4ad5b26b3d98c66769be92779af3dce529c9eb64
More minor hiera fixes

Change-Id: I581992f36977a5e983d78f7191615f8ddaaea062