Removed unnecessary 'self' variable
Simplify tests with user sign in
Don't need to set NODE_ENV in test-helper.js
Removed unused code
Merge branch 'develop' into simplify_test_code
Simplified test code

- removed duplicate copies of verifyError function
- use a single request helper function throughout
Merge pull request #32 from ebu/simplify_test_code

Simplify test code