Tests for test_strings.html

This is a test case for Trac #2775: In xd loading, a local i18n bundle from inside a local module causes errors.

To test, run the buildscripts/convertTestsToXDomain.js script to point to an xd dojo.js and run the test. Be sure to try debugAtAllCosts as true and false.

Success case prints In the local language: Hello below. Wait for the djConfig.xdWaitSeconds timeout to make sure there are not lots of "Could not load cross domain module" errors.