[UI2] ArtifactsId should not be a compulsory field for new service

1) Click on New Service 
2) Create a component

Create Component page has Artifacts Id as compulsory entry. Few yarn service example such as sleeper.json does not need to provide artifacts id.

{
  "name": "sleeper-service",
  "components" :
  [
    {
      "name": "sleeper",
      "number_of_containers": 2,
      "launch_command": "sleep 900000",
      "resource": {
        "cpus": 1,
        "memory": "256"
      }
    }
  ]
}

Thus, artifactsId should not be compulsory field.