Remove type constraint to allow null

Description

When you use terragrunt or even a terraform module calling terraform-aws-consul module you may have spot_price defined but you don't want to assign any value because you want the instances to be on-demand. However since it's templated with the use of a variable, spot_price is always present. Unfortunately the type=number for spot_price makes it impossible to assign an empty value because terraform/terragrunt will tell you that null or "" is not a number.

The change is a simple as not enforcing the type = number in variables.tf

Use case (simplified version)

terragrunt.hcl

terraform {
  source = "git::git@inhouse.net:infrastructure/terraform-modules/cloud-modules.git///aws-consul-server-cluster/"
}
...
inputs = {
  ...
  cluster_name   = "foobar"
  spot_price   = local.SPOT
  ...
}

terraform in-house module

variable "spot_price" {
  description = "If defined, let's use spot instances with a price UP TO this value"
  default     = null
}

module "consul_servers" {
  source = "git::git@github.com:TomGudman/terraform-aws-consul.git//modules/consul-cluster?ref=v0.11.1"

  cluster_name  = var.cluster_name
  cluster_size  = var.num_servers
  instance_type = var.instance_type

  spot_price = var.spot_price
}

Documentation

N/A

TODOs / Related issues

There isn't any issue number yet and I couldn't find one.

hashicorp / terraform-aws-consul