Use a random filename.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9827 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/extra/redmine_pm/repository_subversion_test.rb

@@ -167,7 +167,7 @@ class RedminePmTest::RepositorySubversionTest < RedminePmTest::TestCase
 
   def test_write_commands
     Role.find(2).add_permission! :commit_access
-    filename = DateTime.now.strftime("%y%m%d%H%M%S")
+    filename = random_filename
 
     Dir.mktmpdir do |dir|
       assert_success "checkout", svn_url, dir