This patch updates the templates to use the new ansible role,
tripleo-hosts-entries, for managing the entries in /etc/hosts instead of
the values from the Heat stack.
Change-Id: I606e0f27f9f9ae9d85bc0fc653f8985eb734d004
Depends-On: Ia02ca1263590e2b579f2534e99119d7b1cd4b39a
(cherry picked from commit 597cdb6796)