[MIG]mail_activity_plan:migration to v16

mail_activity_plan/models/__init__.py

@@ -1,2 +1 @@
-from . import mail_activity_plan
-from . import ir_actions
+from . import ir_actions, mail_activity_plan

mail_activity_plan/models/ir_actions.py

@@ -3,6 +3,7 @@
 
 from odoo import fields, models
 
+
 class IrActionsServer(models.Model):
     """ Add activity plan option in server actions. """
     _inherit = 'ir.actions.server'

mail_activity_plan/models/mail_activity_plan.py

@@ -1,7 +1,8 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import api, fields, models, _
+from odoo import _, api, fields, models
+
 
 class MailActivityTemplate(models.Model):
     '''