Add internal column to ServiceTemplate table

https://bugzilla.redhat.com/show_bug.cgi?id=1594408

db/migrate/20180719163110_add_internal_to_service_template.rb

@@ -0,0 +1,17 @@
+class AddInternalToServiceTemplate < ActiveRecord::Migration[5.0]
+  class ServiceTemplate < ActiveRecord::Base
+    self.inheritance_column = :_type_disabled
+  end
+
+  def up
+    add_column :service_templates, :internal, :boolean
+
+    say_with_time("Set ServiceTemplate internal") do
+      ServiceTemplate.where(:type => "ServiceTemplateTransformationPlan").update_all(:internal => true)
+    end
+  end
+
+  def down
+    remove_column :service_templates, :internal
+  end
+end

spec/migrations/20180719163110_add_internal_to_service_template_spec.rb

@@ -0,0 +1,23 @@
+require_migration
+
+describe AddInternalToServiceTemplate do
+  let(:service_template_stub) { migration_stub(:ServiceTemplate) }
+
+  migration_context :up do
+    it "sets internal to true when type is ServiceTemplateTransformationPlan" do
+      st = service_template_stub.create!(:type => 'ServiceTemplateTransformationPlan')
+
+      migrate
+
+      expect(st.reload.internal).to be_truthy
+    end
+
+    it "skip internal for other types" do
+      st = service_template_stub.create!(:type => 'OtherServiceTemplateType')
+
+      migrate
+
+      expect(st.reload.internal).to be_nil
+    end
+  end
+end