Use variables from all.yml for templating it
Use variables from all.yml for templating it

Some variables in all.yml are reusing the other variables from
the same file. It didn't work correctly and the following
change fixes it.

Change-Id: I2f98cf48542540c9d349cda417338aa59ed5b554
Closes-Bug: 1527228

openstack/kolla-mesos,openstack/kolla-mesos,asalkeld/kolla-mesos,openstack/kolla-mesos