use fixed path name for tests. [ruby-dev:42827] * test/rexml/test_sax.rb (SAX2Tester#test_socket): should not use fixed port for tests. [ruby-dev:42828] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30284 b2dd03c8-39d4-4d8f-98ff-823fe69b080e