Finish migration to version 10.0

Do not raise ConnectionError if we get a response
Use ConnectionError from requests lib instead of overriding it
Fix push_to_pingen (writes on state as for cron), remove unneeded loops

pingen/models/base_config_settings.py

@@ -0,0 +1,11 @@
+# -*- coding: utf-8 -*-
+# Copyright 2018 Camptocamp SA
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from odoo import fields, models
+
+
+class BaseConfigSettings(models.TransientModel):
+    _inherit = 'base.config.settings'
+
+    pingen_token = fields.Char(related='company_id.pingen_token')
+    pingen_staging = fields.Boolean(related='company_id.pingen_staging')