Fixes error reporting test

Fixes a test that reports an error when attempting to build a module
that isn't in the filesystem. Test was working fine but because Steal
does a console.log on errors it was sending a File Not Found message
into the console that could be misinterpreted. Fix is to swallow
console.logs during the running of the test and set it back afterwards.
Merge pull request #72 from bitovi/error-swallow

Fixes error reporting test
Updates to the new systemjs
Working on es6 test