Test case for Async Sandbox Test restores mocks before test is completed #565
Fixed premature sandbox destruction, fixed async tests(use promises)
Reverted when.js and promises - they conflict with buster-browser tests
use buster.nextTick for tests browser compatibility
Callback function is now last argument. Added test to ensure that behavior.
Merge pull request #566 from altmind/issue565-mocks-sandbox-done

Test case for Async Sandbox Test restores mocks before test is completed #565