scm: use save instead of scan_comment_for_issue_ids at test_commit_referencing_a_subproject_issue of unit changeset test.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@6737 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/changeset_test.rb

@@ -173,8 +173,7 @@ class ChangesetTest < ActiveSupport::TestCase
                       :committed_on => Time.now,
                       :comments     => 'refs #5, a subproject issue',
                       :revision     => '12345')
-    c.scan_comment_for_issue_ids
-
+    assert c.save
     assert_equal [5], c.issue_ids.sort
     assert c.issues.first.project != c.project
   end