Revert "Merge pull request #20 from kchugalinskiy/master"

This reverts commit 7626d0f, reversing
changes made to cc60714.

modules/vault-elb/main.tf

@@ -6,17 +6,6 @@ terraform {
   required_version = ">= 0.9.3"
 }
 
-# ---------------------------------------------------------------------------------------------------------------------
-# EXTRACT SUBNET INFORMATION IF availability_zones parameter not specified
-# ---------------------------------------------------------------------------------------------------------------------
-
-data "aws_subnet" "subnet" {
-  id = "${var.subnet_ids[count.index]}"
-
-  # Don't try to extract information about AZs in case they are explicitly specified (for backward compatibility).
-  count = "${length(var.availability_zones) == 0 ? length(var.subnet_ids) : 0}"
-}
-
 # ---------------------------------------------------------------------------------------------------------------------
 # CREATE THE ELB
 # ---------------------------------------------------------------------------------------------------------------------
@@ -31,8 +20,7 @@ resource "aws_elb" "vault" {
   connection_draining_timeout = "${var.connection_draining_timeout}"
 
   security_groups    = ["${aws_security_group.vault.id}"]
-  # This split-join hack is a workaround for 'conditional operator cannot be used with list values' typecheck error.
-  availability_zones = ["${split(",", length(var.availability_zones) == 0 ? join(",", data.aws_subnet.subnet.*.availability_zone) : join(",", var.availability_zones))}"]
+  availability_zones = ["${var.availability_zones}"]
   subnets            = ["${var.subnet_ids}"]
 
   # Run the ELB in TCP passthrough mode