Convert spec to test

#623

spec/models/registrar_spec.rb

@@ -10,7 +10,6 @@ describe Registrar do
       @registrar.valid?
       @registrar.errors.full_messages.should include(*[
         'Contact e-mail is missing',
-        'Country code is missing',
         'Name is missing',
         'Reg no is missing',
         'Code is missing'

test/models/registrar_test.rb

@@ -15,9 +15,8 @@ class RegistrarTest < ActiveSupport::TestCase
     assert @registrar.invalid?
   end
 
-  def test_requires_country_code
+  def test_invalid_without_country_code
     @registrar.country_code = nil
-    @registrar.validate
     assert @registrar.invalid?
   end