Rails4: replace deprecated Relation#update_all at ProjectTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12554 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/project_test.rb

@@ -133,8 +133,7 @@ class ProjectTest < ActiveSupport::TestCase
   end
 
   def test_identifier_should_not_be_frozen_for_a_saved_project_with_blank_identifier
-    Project.update_all(["identifier = ''"], "id = 1")
-
+    Project.where(:id => 1).update_all(["identifier = ''"])
     assert_equal false, Project.find(1).identifier_frozen?
   end