Fix typo in resource name.

[josh-padnick]

Thank you to @blaisep for finding the typo. I'll hold off on merging this until I've had an opportunity to assess whether this constitutes a backward-incompatible change to this repo. Since this is just a firewall rule, I doubt it, but I'll manually test to make sure.

[josh-padnick]

It looks like this is backwards-compatible change, but users may have to run terraform apply twice for it to work. Here's the Terraform exerience I had when running terraform apply after updating to this branch:

Terraform will perform the following actions:

  + module.consul_servers.google_compute_firewall.allow_inbound_http_api
      id:                        <computed>
      allow.#:                   "1"
      allow.2855179054.ports.#:  "1"
      allow.2855179054.ports.0:  "8500"
      allow.2855179054.protocol: "tcp"
      destination_ranges.#:      <computed>
      direction:                 <computed>
      name:                      "consul-server-josh-rule-external-api-access"
      network:                   "default"
      priority:                  "1000"
      project:                   <computed>
      self_link:                 <computed>
      source_ranges.#:           "1"
      source_ranges.1080289494:  "0.0.0.0/0"
      source_tags.#:             "1"
      source_tags.3857602526:    "consul-client-josh"
      target_tags.#:             "1"
      target_tags.3220366684:    "consul-server-josh"

  - module.consul_servers.google_compute_firewall.allow_inbound_http_api_typo


Plan: 1 to add, 0 to change, 1 to destroy.

Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

module.consul_servers.google_compute_firewall.allow_inbound_http_api_typo: Destroying... (ID: consul-server-josh-rule-external-api-access)
module.consul_servers.google_compute_firewall.allow_inbound_http_api: Creating...
  allow.#:                   "" => "1"
  allow.2855179054.ports.#:  "" => "1"
  allow.2855179054.ports.0:  "" => "8500"
  allow.2855179054.protocol: "" => "tcp"
  destination_ranges.#:      "" => "<computed>"
  direction:                 "" => "<computed>"
  name:                      "" => "consul-server-josh-rule-external-api-access"
  network:                   "" => "default"
  priority:                  "" => "1000"
  project:                   "" => "<computed>"
  self_link:                 "" => "<computed>"
  source_ranges.#:           "" => "1"
  source_ranges.1080289494:  "" => "0.0.0.0/0"
  source_tags.#:             "" => "1"
  source_tags.3857602526:    "" => "consul-client-josh"
  target_tags.#:             "" => "1"
  target_tags.3220366684:    "" => "consul-server-josh"
module.consul_servers.google_compute_firewall.allow_inbound_http_api_typo: Still destroying... (ID: consul-server-josh-rule-external-api-access, 10s elapsed)
module.consul_servers.google_compute_firewall.allow_inbound_http_api_typo: Destruction complete after 11s

Error: Error applying plan:

1 error(s) occurred:

* module.consul_servers.google_compute_firewall.allow_inbound_http_api: 1 error(s) occurred:

* google_compute_firewall.allow_inbound_http_api: Error creating firewall: googleapi: Error 409: The resource 'projects/consul-176820/global/firewalls/consul-server-josh-rule-external-api-access' already exists, alreadyExists

This is probably just an eventual consistency error where the destroy did not fully process before the create began. Running a second time resulted in the desired outcome:

Terraform will perform the following actions:

  + module.consul_servers.google_compute_firewall.allow_inbound_http_api
      id:                        <computed>
      allow.#:                   "1"
      allow.2855179054.ports.#:  "1"
      allow.2855179054.ports.0:  "8500"
      allow.2855179054.protocol: "tcp"
      destination_ranges.#:      <computed>
      direction:                 <computed>
      name:                      "consul-server-josh-rule-external-api-access"
      network:                   "default"
      priority:                  "1000"
      project:                   <computed>
      self_link:                 <computed>
      source_ranges.#:           "1"
      source_ranges.1080289494:  "0.0.0.0/0"
      source_tags.#:             "1"
      source_tags.3857602526:    "consul-client-josh"
      target_tags.#:             "1"
      target_tags.3220366684:    "consul-server-josh"


Plan: 1 to add, 0 to change, 0 to destroy.

Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

module.consul_servers.google_compute_firewall.allow_inbound_http_api: Creating...
  allow.#:                   "" => "1"
  allow.2855179054.ports.#:  "" => "1"
  allow.2855179054.ports.0:  "" => "8500"
  allow.2855179054.protocol: "" => "tcp"
  destination_ranges.#:      "" => "<computed>"
  direction:                 "" => "<computed>"
  name:                      "" => "consul-server-josh-rule-external-api-access"
  network:                   "" => "default"
  priority:                  "" => "1000"
  project:                   "" => "<computed>"
  self_link:                 "" => "<computed>"
  source_ranges.#:           "" => "1"
  source_ranges.1080289494:  "" => "0.0.0.0/0"
  source_tags.#:             "" => "1"
  source_tags.3857602526:    "" => "consul-client-josh"
  target_tags.#:             "" => "1"
  target_tags.3220366684:    "" => "consul-server-josh"
module.consul_servers.google_compute_firewall.allow_inbound_http_api: Still creating... (10s elapsed)
module.consul_servers.google_compute_firewall.allow_inbound_http_api: Creation complete after 11s (ID: consul-server-josh-rule-external-api-access)

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