Remove advanced data mappings

Advanced isn't in the hierarchy and therefore
isn't actually used. There are mappings for keystone
region and package_ensure in there that have been
added to data_mappings/common, and the defaults have
been added to hiera_data/common.

Change-Id: I057182ebdee0ee3531fe3821186d6fa36e82ca0b
Merge "Remove advanced data mappings"