Create RemoteTranslation model

- Each RemoteTranslation is associated with a resource (through polymorphic)
  and has the locale to we want translate.
- After create a RemoteTranslation we create a enqueue_remote_translation
  method that will be send remote translation instance to remote translation
  client

spec/models/remote_translation_spec.rb

@@ -0,0 +1,32 @@
+require "rails_helper"
+
+describe RemoteTranslation do
+
+  let(:remote_translation) { build(:remote_translation, locale: :es) }
+
+  it "is valid" do
+    expect(remote_translation).to be_valid
+  end
+
+  it "is valid without error_message" do
+    remote_translation.error_message = nil
+    expect(remote_translation).to be_valid
+  end
+
+  it "is not valid without to" do
+    remote_translation.locale = nil
+    expect(remote_translation).not_to be_valid
+  end
+
+  it "is not valid without a remote_translatable_id" do
+    remote_translation.remote_translatable_id = nil
+    expect(remote_translation).not_to be_valid
+  end
+
+  it "is not valid without a remote_translatable_type" do
+    remote_translation.remote_translatable_type = nil
+    expect(remote_translation).not_to be_valid
+  end
+  end
+
+end