Indentation of the class parameters is refactored

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

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

Change-Id: I336a845d5b2256c90987e1295545dbf26fd2076b

manifests/init.pp

@@ -10,8 +10,8 @@
 #   public_tcp_ports: List of integer TCP ports on which to allow all traffic
 #   public_udp_ports: List of integer UDP ports on which to allow all traffic
 class iptables(
-  $rules4 = [],
-  $rules6 = [],
+  $rules4           = [],
+  $rules6           = [],
   $public_tcp_ports = [],
   $public_udp_ports = []
 ) {