sale_hide_makeinvoice_button/security/sale_hide_makeinvoice_button_security.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data noupdate="0">
        <record id="sale.group_hide_makeinvoice_button" model="res.groups">
            <field name="name">Habilitar (marcado) crear factura y cancelar pedido </field>
            <field name="category_id" ref="base.module_category_hidden" />
            <field name="users" eval="[(4, ref('base.user_root'))]"/>
        </record>
    </data>
</openerp>