Update kolla_internal_fqdn to database_address since it defined in all.yml

through the database_address has beed defined in groups_vars/all.yml, we should
better use it, this way, if we want to use external database, we just need to
redefined in all.yml

refer to https://github.com/openstack/kolla-ansible/blob/master/ansible/group_vars/all.yml#L83


Co-Authored-By: chenqiaomin <chen.qiaomin@99cloud.net>

Change-Id: Ie559301451954e16347ceaabf02f594c5c5cbe56