feat: Add support to tag default route table

[lays147]

Signed-off-by: Lays Rodrigues laysrodriguessilva@gmail.com

Description

Add support to tag default route table since PR #147 is getting dust.

Motivation and Context

So far this is the only resource on this module that has not set a Name by default. And I like my resources tagged :3

Breaking Changes

Not that I know.

How Has This Been Tested?

Used terraform 0.14

terraform fmt
terraform validate
terraform plan
terraform apply

  # module.vpc.aws_default_route_table.default[0] must be replaced
-/+ resource "aws_default_route_table" "default" {
      + default_route_table_id = "rtb-id"
      + id                     = (known after apply)
      + owner_id               = (known after apply)
      + route                  = (known after apply)
      + tags                   = {
          + "Name"                            = "my-rt-name"
          + "environment"                     = "development"
          + "kubernetes.io/cluster/beira-rio" = "shared"
        }
      + vpc_id                 = (known after apply)
    }

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.

[lays147]

ping @antonbabenko

[egarbi]

Have you tried running this over an already created VPC?
Since default_route_table is created by default by aws_vpc resource, adding this piece of code after, it may cause conflicts trying to create a route that is already created.
If this is true, one would have to use an import to solve the issue, something like:

terraform import aws_default_route_table.default aws_vpc.this.id

This can be tricky for people trying to update the module to a newer version.

[daroga0002]

aws_default-route_table is special resource and it is not creating any new route table but is used to pull existing one and manage it using terraform.

As per:
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/default_route_table

Each VPC created in AWS comes with a Default Route Table that can be managed, but not destroyed. This is an advanced resource, and has special caveats to be aware of when using it. ```

[github-actions]

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