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

stock.xml

@@ -51,7 +51,8 @@ this repository contains the full copyright notices and license terms. -->
         <record model="ir.action.act_window" id="act_move_form_relate_lot">
             <field name="name">Moves</field>
             <field name="res_model">stock.move</field>
-            <field name="domain">[('lot', 'in', Eval('active_ids'))]</field>
+            <field name="domain"
+                eval="[('lot', 'in', Eval('active_ids'))]" pyson="1"/>
             <field name="order">[('effective_date', 'DESC'), ('planned_date', 'DESC')]</field>
         </record>
         <record model="ir.action.keyword"

view/template_form.xml

@@ -3,8 +3,7 @@
 this repository contains the full copyright notices and license terms. -->
 <data>
     <xpath expr="/form/notebook/page[@id='general']" position="after">
-        <page string="Lots" id="lots"
-            states="{'invisible': ~Eval('type').in_(['goods', 'assets'])}">
+        <page string="Lots" name="lot_required">
             <label name="lot_required"/>
             <field name="lot_required" widget="multiselection" yexpand="0"/>
         </page>