Add missing models requires to ActiveRecord tests

Author: fatkodima

activerecord/test/cases/fixtures_test.rb

@@ -17,6 +17,7 @@
 require "models/computer"
 require "models/course"
 require "models/developer"
+require "models/dog_lover"
 require "models/dog"
 require "models/doubloon"
 require "models/essay"

activerecord/test/cases/nested_attributes_test.rb

@@ -2,6 +2,7 @@
 
 require "cases/helper"
 require "models/pirate"
+require "models/developer"
 require "models/ship"
 require "models/ship_part"
 require "models/bird"