[WIP] Build a small automate model using factory girl

This PR builds a small automate model with the hierarchy
 DOMAIN
      NAMESPACES
          CLASS
              INSTANCES
              METHODS
e.g.
FactoryGirl.create(:miq_ae_domain, :with_small_model, :name => 'FRED')
Would this work without `trait :with_values`

just have
```
after :create do |aeinstance, evaluator|
  if evaluator.values.present?
    aeinstance.ae_class.ae_fields.each do |field|
    [...]
  end
end
```