Adding Greek Language mailing list in the corresponding puppet module

Following the same structure as other language specific lists,
an addition for the 'openstack-el' mailing list is proposed.
Please note that 'EL' is the corresponding 2 letter ISO for Greek.

Change-Id: Ie430595e078c5ecfe215fd176b9bbf96cc4b4bba

modules/openstack_project/manifests/lists.pp

@@ -75,6 +75,15 @@ class openstack_project::lists(
     mailserver  => $listdomain,
   }
 
+  maillist { 'openstack-el':
+    ensure      => present,
+    admin       => 'aparathyras@stackmasters.eu',
+    password    => $listpassword,
+    description => 'List of the OpenStack Greek User Group',
+    webserver   => $listdomain,
+    mailserver  => $listdomain,
+  }
+
   maillist { 'openstack-travel-committee':
     ensure      => present,
     admin       => 'communitymngr@openstack.org',