Adjust syntax in constricto code

manifests/firewall.pp

@@ -12,6 +12,6 @@ class puppet_cwsens::firewall{
   ::server_firewall::constricto_chain{'ipsum-mqtt': }
   ::server_firewall::rules_file { '55-permit-ipsum-mqtt.rules':
     content => $mqtt_rule,
-    require => ::server_firewall::Constricto_chain['ipsum-mqtt'],
+    require => ::Server_firewall::Constricto_chain['ipsum-mqtt'],
   }
 }