[FIX] beesdoo_shift : Error when saving a temporary exempt

Add missing sequence in database.

beesdoo_shift/__openerp__.py

@@ -13,7 +13,7 @@
     'website': "https://github.com/beescoop/Obeesdoo",
 
     'category': 'Cooperative management',
-    'version': '9.0.1.2.0',
+    'version': '9.0.1.2.1',
 
     'depends': ['beesdoo_base'],
 

beesdoo_shift/migrations/9.0.1.2.1/post-migrate.py

@@ -0,0 +1,11 @@
+# coding: utf-8
+
+
+def migrate(cr, version):
+    """Fix bug occuring when trying to save a temporary exempt
+     (missing sequence in database). """
+    cr.execute(
+        """
+        CREATE SEQUENCE IF NOT EXISTS beesdoo_website_shift_config_settings_id_seq
+        """
+    )