verify download content unit test is failing

```
  1) Content Download content verify download content:
     Uncaught AssertionError: false == true
      at /opt/sakai/oae/repos/Hilary/node_modules/oae-content/tests/test-content.js:310:48
      at Request.<anonymous> (/opt/sakai/oae/repos/Hilary/node_modules/oae-rest/lib/api.content.js:405:17)
      at Request.EventEmitter.emit (events.js:117:20)
      at IncomingMessage.<anonymous> (/opt/sakai/oae/repos/Hilary/node_modules/request/index.js:842:12)
      at IncomingMessage.EventEmitter.emit (events.js:117:20)
      at _stream_readable.js:910:16
      at process._tickDomainCallback (node.js:459:13)
```