web_window_title/data/demo.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data noupdate="1">

         <record id="config_parameter_web_base_title_demo" model="ir.config_parameter">
            <field name="key">web.base.title</field>
            <field name="value">Demo</field>
        </record>

    </data>
</openerp>