Add a repair_helper to repair changes to the validations inside valid…

…ations_test.rb [#674 state:resolved]

Many of the tests in validations_test would add a new validation to
models.  However, only Topic was being reset with a fairly aggressive
clearing of all validations.  None of the other models being used however
were recieving the same treatment.  Now we use repair_validations(Topic)
for the whole test case because most test cases use Topic and then the
block form of repair_validations(<other_models>) inside any tests that use
other models.

Signed-off-by: Pratik Naik <pratiknaik@gmail.com>

activerecord/test/cases/helper.rb

@@ -9,6 +9,8 @@
 require 'active_record/fixtures'
 require 'connection'
 
+require 'cases/repair_helper'
+
 # Show backtraces for deprecated behavior for quicker cleanup.
 ActiveSupport::Deprecation.debug = true
 
@@ -60,6 +62,8 @@ def try_to_load_dependency_with_silence(*args)
 
 class ActiveSupport::TestCase
   include ActiveRecord::TestFixtures
+  include ActiveRecord::Testing::RepairHelper
+
   self.fixture_path = FIXTURES_ROOT
   self.use_instantiated_fixtures  = false
   self.use_transactional_fixtures = true