nova upgrade failing through kolla-ansible

While upgrading nova from the code base 05/12/2016 to the code base 20/12/2016
the nova upgrade fails with error ""msg": "Container exited with non-zero return code""

tried upgrading from code base 29/11/2016 to 05/12/2016 which works fine

seems like nova introduced the cell_v2 as a fix of "https://bugs.launchpad.net/tripleo/+bug/1649341"
which broke the upgrade

ae2b215253a9 registry.example.com:5000/cas/oraclelinux-source-nova-api:next "kolla_start" 5 minutes ago Exited (1) 4 minutes ago
from container logs

<snip>
# docker logs ae2b215253a9

INFO:__main__:Kolla config strategy set to: COPY_ALWAYS
INFO:__main__:Loading config file at /var/lib/kolla/config_files/config.json
INFO:__main__:Validating config file
INFO:__main__:Copying service configuration files
INFO:__main__:Copying /var/lib/kolla/config_files/nova.conf to /etc/nova/nova.conf
INFO:__main__:Setting permissions for /etc/nova/nova.conf
INFO:__main__:Writing out command to execute
INFO:__main__:Setting permission for /var/log/kolla/nova
INFO:__main__:Setting permission for /var/log/kolla/nova/nova-manage.log
INFO:__main__:Setting permission for /var/log/kolla/nova/nova-api.log
INFO:__main__:Setting permission for /var/log/kolla/nova/nova-consoleauth.log
INFO:__main__:Setting permission for /var/log/kolla/nova/nova-scheduler.log
INFO:__main__:Setting permission for /var/log/kolla/nova/nova-novncproxy.log
INFO:__main__:Setting permission for /var/log/kolla/nova/nova-conductor.log
INFO:__main__:Setting permission for /var/log/kolla/nova/nova-compute.log
WARNING: cell0 mapping not found - not syncing cell0.
An error has occurred:
Traceback (most recent call last):
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/cmd/manage.py", line 1584, in main
    ret = fn(*fn_args, **fn_kwargs)
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/cmd/manage.py", line 948, in sync
    return migration.db_sync(version, database='api')
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/db/migration.py", line 26, in db_sync
    return IMPL.db_sync(version=version, database=database, context=context)
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/db/sqlalchemy/migration.py", line 57, in db_sync
    repository, version)
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/migrate/versioning/api.py", line 186, in upgrade
    return _migrate(url, repository, version, upgrade=True, err=err, **opts)
  File "<decorator-gen-15>", line 2, in _migrate
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/migrate/versioning/util/__init__.py", line 160, in with_engine
    return f(*a, **kw)
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/migrate/versioning/api.py", line 366, in _migrate
    schema.runchange(ver, change, changeset.step)
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/migrate/versioning/schema.py", line 93, in runchange
    change.run(self.engine, step)
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/migrate/versioning/script/py.py", line 148, in run
    script_func(engine)
  File "/var/lib/kolla/venv/lib/python2.7/site-packages/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/030_require_cell_setup.py", line 41, in upgrade
    raise exception.ValidationError(detail=msg)
ValidationError: Cell mappings are not created, but required for Ocata. Please run nova-manage cell_v2 simple_cell_setup before continuing.
</snip>