Remove safe_eval

We convert all the fields that were storing python code into PYSON.
We add a pyson attribute on field tag to store PYSON value.

issue4416
review6971002

timesheet.xml

@@ -18,7 +18,9 @@ this repository contains the full copyright notices and license terms. -->
     <record model="ir.action.act_window" id="act_timesheet_line_form_invoice">
         <field name="name">Timesheet Lines</field>
         <field name="res_model">timesheet.line</field>
-        <field name="domain">[('invoice_line.invoice', 'in', Eval('active_ids'))]</field>
+        <field name="domain"
+            eval="[('invoice_line.invoice', 'in', Eval('active_ids'))]"
+            pyson="1"/>
     </record>
     <record model="ir.action.keyword"
         id="act_timesheet_line_form_invoice_keyword1">