Mount config-data/puppet-generated/nova for nova_api_ensure_default_cell

When an update changes NovaPassword, we need to run
nova_api_ensure_default_cell container for it to be able to change
the db_connection for the cells in nova_api db. Otherwise
nova_api_discover_hosts which runs all the time fails with db erorr
as the connection string in the database would not change.

Currently, we don't mount either /var/lib/config-data/nova or
/var/lib/config-data/puppet-generated/nova, hence the
TRIPLEO_CONFIG_HASH is not generated for the container and it
does not run during update and may be not in upgrade either.

Change-Id: I0a972796e45a8df614619c95e9d9be9af183b4e5
Closes-Bug: #1805803
(cherry picked from commit 0012c42e6c)

docker/services/nova-api.yaml

@@ -245,9 +245,8 @@ outputs:
               list_concat:
                 - *nova_api_bootstrap_volumes
                 -
-                  - /var/lib/config-data/nova/etc/my.cnf.d/tripleo.cnf:/etc/my.cnf.d/tripleo.cnf:ro
-                  - /var/lib/config-data/nova/etc/nova/:/etc/nova/:ro
                   - /var/log/containers/nova:/var/log/nova
+                  - /var/lib/config-data/puppet-generated/nova/:/var/lib/kolla/config_files/src:ro
                   - /var/lib/docker-config-scripts/nova_api_ensure_default_cell.sh:/nova_api_ensure_default_cell.sh:ro
             user: root
             command: "/usr/bin/bootstrap_host_exec nova_api /nova_api_ensure_default_cell.sh"