Fix 404s. Make Load Balancer CIDR Block ranges specifiable.

[josh-padnick]

This PR fixes a few lingering broken links. In addition, it implements some trivial changes requested by @bgt101.

'cc @infosecgithub

[bgt101]

Thanks @josh-padnick for making these changes. Currently those root_volume_disk_size_gb and root_volume_disk_type parameters are only used by vault_public in modules/vault-cluster/main.tf in the disk block:

  disk {
    boot         = true
    auto_delete  = true
    source_image = "${var.source_image}"
    disk_size_gb = "${var.root_volume_disk_size_gb}"
    disk_type    = "${var.root_volume_disk_type}"
  }

but they are missing from vault_private around line 117:

  disk {
    boot         = true
    auto_delete  = true
    source_image = "${var.source_image}"
  }

There's a similar omission in terraform-google-consul too in the modules/consul-cluster/main.tf file around line 116.

[josh-padnick]

Ah, I thought I was missing something. Thanks for clarifying. Just fixed in 63fa059!