keystone_data.sh is getting unwieldly and increasingly needs
configuration information for services. Also need the ability
to manipulate HOST/IP information for hosts to handle service
HA/proxy configurations.
Begin moving the creation of service account information into
the service lib files, starting with the common accounts and
keystone itself.
Change-Id: Ie259f7b71983c4f4a2e33ab9c8a8e2b00238ba38