Xfail due to Bug 882555 - /demos doesn't load -- redirects ad-naseum

https://bugzilla.mozilla.org/show_bug.cgi?id=882555
Here's the fail on prod: http://qa-selenium.mv.mozilla.com:8080/job/mozilla.com.prod/lastCompletedBuild/testReport/tests.test_technology/TestTechnologyPage/test_more_info_link_urls_are_valid/