Terraform no longer supports the map function

[tkob]

What would you like to be added:

The Terraform scripts in contrib/terraform/aws directory use the map function, but they should be replaced with the tomap function like the following for them to work with new versions of Terraform.

-  tags = merge(var.default_tags, map(
-    "Name", "kubernetes-${var.aws_cluster_name}-master${count.index}",
-    "kubernetes.io/cluster/${var.aws_cluster_name}", "member",
-    "Role", "master"
-  ))
+  tags = merge(var.default_tags, tomap({
+    Name = "kubernetes-${var.aws_cluster_name}-master${count.index}"
+    "kubernetes.io/cluster/${var.aws_cluster_name}" = "member"
+    Role = "master"
+  }))

Why is this needed:

The map function is no longer available in newer versions.

https://www.terraform.io/docs/language/functions/map.html

I am ready to provide patches if you like.

[floryut]

@tkob Happy to see a PR with that if you're up to it, thank you