[FIX] google_calendar: Google doesn't allow wrong attendee emails

Odoo allows bad formatted emails for partners (and attendees).
Google doesn't.
Therefore, upon sync, if the email is wrong, we do
not send it to Google, to avoid Google being mad at us.

opw-646369

addons/google_calendar/google_calendar.py

@@ -216,8 +216,10 @@ class google_calendar(osv.AbstractModel):
             vstype = 'date'
         attendee_list = []
         for attendee in event.attendee_ids:
+            email = tools.email_split(attendee.email)
+            email = email[0] if email else 'NoEmail@mail.com'
             attendee_list.append({
-                'email': attendee.email or 'NoEmail@mail.com',
+                'email': email,
                 'displayName': attendee.partner_id.name,
                 'responseStatus': attendee.state or 'needsAction',
             })