Increase the too low limit of what a hateos call should return. useful for testnode case.

@rafael , please check as probably exists a better way of doing (at https://lab.nexedi.com/nexedi/erp5/blob/master/bt5/erp5_hal_json_style/SkinTemplateItem/portal_skins/erp5_hal_json_restricted_style/ERP5Document_getHateoas.xml#L53 level).

For sure it helps and makes testnode work