Fix warnings when running test suites

Author: yasulab

spec/rails_helper.rb

@@ -28,7 +28,7 @@
 
 RSpec.configure do |config|
   # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
-  config.fixture_path = "#{::Rails.root}/spec/fixtures"
+  config.fixture_paths = ["#{::Rails.root}/spec/fixtures"]
 
   # If you're not using ActiveRecord, or you'd prefer not to run each of your
   # examples within a transaction, remove the following line or assign false