Revert "Revert "Specify cell0 db creation""

This reverts commit 34f3ab6896.

Creating the cells database doesn't hurt anything and will fix
issues using the new Docker nova services for development
(these packages are more recent and require cells).

Change-Id: I85b0e80ca208ef3ca3dfadfe6e98d83ec009a31d

puppet/services/nova-base.yaml

@@ -140,6 +140,10 @@ outputs:
           - nova::upgrade_level_compute: {get_param: UpgradeLevelNovaCompute}
       service_config_settings:
         mysql:
+          # NOTE(aschultz): this should be configurable if/when we support more
+          # complex cell v2 configurations. For now, this is the default cell
+          # created for the cell v2 configuration
+          nova::db::mysql_api::setup_cell0: true
           nova::rabbit_password: {get_param: RabbitPassword}
           nova::rabbit_userid: {get_param: RabbitUserName}
           nova::rabbit_use_ssl: {get_param: RabbitClientUseSSL}