Set eavesdrop vhost

Now that it is on a numbered host, this should no longer be the FQDN,
but rather the service name.

Change-Id: Ia2533ac144f2ef3712730c43639bd4edcf3cb35a

modules/openstack_project/manifests/eavesdrop.pp

@@ -42,6 +42,7 @@ class openstack_project::eavesdrop (
     server       => 'chat.freenode.net:7000',
     use_ssl      => 'True',
     vhost_extra  => $vhost_extra,
+    vhost_name   => 'eavesdrop.openstack.org',
     manage_index => false,
     channels     => $meetbot_channels,
   }