hr_payslip_extend/workflows/hr_payroll_workflow.xml
<?xml version="1.0" encoding="utf-8" ?>
<openerp>
<data>
<record id="hr_payroll.t5" model="workflow.transition">
<field name="act_from" ref="hr_payroll.act_verify" />
<field name="act_to" ref="hr_payroll.act_done" />
<field name="signal">button_done</field>
</record>
</data>
</openerp>