[FIX] website_livechat: reference of demo data was preventing to install the module

Added a record of im_livechat.channel in website_livechat data

addons/website_livechat/website_livechat_data.xml

@@ -2,8 +2,13 @@
  <openerp>
      <data noupdate="1">
 
+         <record id="channel_website" model="im_livechat.channel">
+             <field name="name">YourWebsiteWithOdoo.com</field>
+             <field name="default_message">Hello, how may I help you?</field>
+         </record>
+
          <record id="website.default_website" model="website">
-             <field name="channel_id" ref="im_livechat.channel_website"></field>
+             <field name="channel_id" ref="website_livechat.channel_website"></field>
          </record>
 
      </data>