Double up on NATs for prod-3

Author: Duologic

gce-production-net-3/main.tf

@@ -79,7 +79,7 @@ module "gce_net" {
   nat_conntracker_config        = "${file("nat-conntracker.env")}"
   nat_conntracker_dst_ignore    = ["${var.nat_conntracker_dst_ignore}"]
   nat_conntracker_src_ignore    = ["${var.nat_conntracker_src_ignore}"]
-  nat_count_per_zone            = 1
+  nat_count_per_zone            = 2
   nat_image                     = "${var.gce_nat_image}"
   nat_machine_type              = "n1-standard-4"
   project                       = "${var.project}"