[MIG] sale_usability to v14 (with up-ports from v10)

sale_usability/models/product_template.py

@@ -0,0 +1,14 @@
+# Copyright 2017-2019 Akretion France
+# @author: Alexis de Lattre <alexis.delattre@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import fields, models
+
+
+class ProductTemplate(models.Model):
+    _inherit = 'product.template'
+
+    service_type = fields.Selection(tracking=True)
+    expense_policy = fields.Selection(tracking=True)
+    invoice_policy = fields.Selection(tracking=True)
+    sale_line_warn = fields.Selection(tracking=True)