Indentation of the parameters is refactored

Indentation of those parameters is changed to follow
Puppet Style Guide recommendation [0].

[0]. https://docs.puppetlabs.com/guides/style_guide.html

Change-Id: I2ba64dd2438caf0eb6ed7a4bd8683708dfb83178

manifests/site.pp

@@ -5,8 +5,8 @@ define meetbot::site(
   $nickpass,
   $server,
   $use_ssl,
-  $vhost_name = $::fqdn,
-  $vhost_extra = undef,
+  $vhost_extra  = undef,
+  $vhost_name   = $::fqdn,
   $manage_index = true,
 ) {