[FIX] event_sale: create tickets with default product type "service"

In some cases when creating a new ticket, the default product
type shown is a "Consumable". It should rather be handled as a
"Service". In later versions, a detailed type is created, but the
base product type should be set to service too.

This commit uses the `product_id` `context` to set the default
detailed type to "event".

Task-2655226

closes odoo/odoo#78690

X-original-commit: a03e12810152559efc712cb067756d517c7647ca
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/event_sale/views/event_ticket_views.xml

@@ -8,7 +8,7 @@
         <field name="inherit_id" ref="event.event_type_ticket_view_tree_from_type"/>
         <field name="arch" type="xml">
             <field name="name" position="after">
-                <field name="product_id"/>
+                <field name="product_id" context="{'default_detailed_type': 'event'}"/>
             </field>
             <field name="description" position="after">
                 <field name="price"/>
@@ -22,7 +22,7 @@
         <field name="inherit_id" ref="event.event_type_ticket_view_form_from_type"/>
         <field name="arch" type="xml">
             <field name="name" position="after">
-                <field name="product_id"/>
+                <field name="product_id" context="{'default_detailed_type': 'event'}"/>
             </field>
             <field name="description" position="after">
                 <field name="price"/>