require('test') -> require('sdk/test') a=me

[skip ci]
Merge branch 'master' of https://github.com/mozilla/addon-sdk
using sudo: false for faster travis builds

see: http://blog.travis-ci.com/2014-12-17-faster-builds-with-container-based-infrastructure/
REQUIRE_LINE_NO in test-require.js should be 29 now a=me
Merge pull request #1790 from erikvold/master

Travis build upgrade a=me