consul block inside group is silently ignored on Nomad OSS

[lgfa29]

Nomad version

1.2.0-beta1

Operating system and Environment details

MacOS

Issue

consul is an Enterprise-only field but if a job is registered against an OSS cluster the job registration works without error and the field is silently ignored.

Reproduction steps

1. Run job with consul block against an OSS cluster
2. Retrieve job spec from the Nomad API

Expected Result

An error message is thrown similar to what happens with multiregion.

$ nomad run example.nomad
Error submitting job: Unexpected response code: 500 (1 error occurred:
        * Multiregion jobs are unlicensed.

)

Actual Result

Job is registered, but field is silently ignored.

Job file (if appropriate)

job "example" {
  datacenters = ["dc1"]

  group "cache" {
    consul {
      namespace = "dev"
    }

    task "redis" {
      driver = "docker"
      config {
        image = "redis:3.2"
      }
    }
  }
}

[github-actions]

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