[IMP] maintenance_server_data: add active field in service.instance model

and make the active field value follow the equipement active field

maintenance_server_data/models/service.py

@@ -19,6 +19,7 @@ class ServiceInstance(models.Model):
     service_id = fields.Many2one('service', string='Service', required=True)
     version_id = fields.Many2one('service.version', string='Version')
     service_url = fields.Char(string='Service Url')
+    active = fields.Boolean(default=True)
 
 
 class BackupServer(models.Model):