[ADD] pos_change_sale_move: migration file

The purpose of this migration file is to set the right Sale Move Policy
for databases where the previous version of this module was installed in
order to not change the behaviour of this module on theses databases.

grap_pos_change_sale_move/__manifest__.py

@@ -4,7 +4,7 @@
 
 {
     "name": "Point Of Sale - Change Sale Move Lines",
-    "version": "12.0.1.0.2",
+    "version": "12.0.2.0.1",
     "category": "Point Of Sale",
     "author": "GRAP",
     "website": "https://github.com/grap/grap-odoo-custom-account",

grap_pos_change_sale_move/migrations/12.0.2.0.0/post-migration.py

@@ -0,0 +1,10 @@
+# Copyright (C) 2021 - Today: Coop IT Easy (http://coopiteasy.be)
+# @author: Rémy TAYMANS ([email protected])
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+
+
+def migrate(cr, version):
+    # Set default configuration for pos.config to not change de previous
+    # behaviour of this module
+    query = "UPDATE pos_config SET sale_move_policy = 'groupby_account_tax';"
+    cr.execute(query)