This default identity and credentials defined in the metadata are supposed to be the "api" credentials, not the ones to connect to the containers. Default credentials for deploiyed nodes can be set with the [IMAGE_LOGIN_USER](https://github.com/jclouds/jclouds/blob/master/compute/src/main/java/org/jclouds/compute/config/ComputeServiceProperties.java#L87) property, in the metadata detault properties.