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

production.xml

@@ -26,7 +26,8 @@ this repository contains the full copyright notices and license terms. -->
         <record model="ir.action.act_window" id="act_production_request">
             <field name="name">Request Productions</field>
             <field name="res_model">production</field>
-            <field name="search_value">[('state', '=', 'request')]</field>
+            <field name="search_value"
+                eval="[('state', '=', 'request')]" pyson="1"/>
         </record>
         <record model="ir.action.act_window.view"
             id="act_production_request_view1">

stock.xml

@@ -7,7 +7,8 @@ this repository contains the full copyright notices and license terms. -->
                 id="act_order_point_form_domain_production">
             <field name="name">Production</field>
             <field name="sequence" eval="30"/>
-            <field name="domain">[('type', '=', 'production')]</field>
+            <field name="domain"
+                eval="[('type', '=', 'production')]" pyson="1"/>
             <field name="act_window" ref="stock_supply.act_order_point_form"/>
         </record>
     </data>