Update composer.json to respect psr4
Update composer.json to respect psr4

Aylarius/SonataPageBundle,grimpows/SonataPageBundle,Dunduro/SonataPageBundle,grimpows/SonataPageBundle,Th3Mouk/SonataPageBundle,Aylarius/SonataPageBundle,Aylarius/SonataPageBundle,Th3Mouk/SonataPageBundle,sonata-project/SonataPageBundle,grimpows/SonataPageBundle,Dunduro/SonataPageBundle,Dunduro/SonataPageBundle,Dunduro/SonataPageBundle,sonata-project/SonataPageBundle,Dunduro/SonataPageBundle,Th3Mouk/SonataPageBundle,Aylarius/SonataPageBundle,grimpows/SonataPageBundle,Th3Mouk/SonataPageBundle,Aylarius/SonataPageBundle,grimpows/SonataPageBundle