Use keystone profile parameter to pass heat password

Instead of relying on an explicit hiera call to get the stack domain
password, this uses the keystone parameter to introduce that value
instead.

Change-Id: I0e5124d57fdc519262fdec2dbeaaac85afaeebdf

puppet/services/heat-engine.yaml

@@ -105,4 +105,4 @@ outputs:
             - "%{hiera('mysql_bind_host')}"
         keystone:
             # This is needed because the keystone profile handles creating the domain
-            heat::keystone::domain::domain_password: {get_param: HeatStackDomainAdminPassword}
+            tripleo::profile::base::keystone::heat_admin_password: {get_param: HeatStackDomainAdminPassword}