Restrict automatic emails to partner

This module sets the default value of the field "Opt-Out" to True while creating a Partner. In standard Odoo, that field is defined in the module email_template and its default value is False.

As stated in the help comment for the field (Odoo code, module email_template): `

help="If opt-out is checked, this contact has refused to receive emails for mass mailing and marketing campaign. "

`

By installing this module, newly created partners by default will not receive marketing emails or other kind of automated emails.