Enable LDAP support on mediawiki

Users can log in using their LDAP account (in the
ou=users,dc=kosmos,dc=org group and with the wiki attribute set to
enabled)

Add an attribute for the ldap master server, so it can be overridden in
the development environment

Refs #107

site-cookbooks/kosmos-dirsrv/recipes/default.rb

@@ -27,7 +27,7 @@
 credentials = data_bag_item("credentials", "dirsrv")
 
 dirsrv_instance "master" do
-  hostname "ldap.kosmos.org"
+  hostname node['kosmos-dirsrv']['master_hostname']
   admin_password credentials['admin_password']
   suffix "dc=kosmos,dc=org"
 end