Update page fixtures for new header

I've updated fixtures to have new header organized like this:

![capture decran 2014-02-19 a 14 03 01](https://f.cloud.github.com/assets/103900/2206668/7b18b5ea-9966-11e3-850b-6056db8ce6cf.png)

The following PR must be merged: https://github.com/sonata-project/SonataPageBundle/pull/292