Added the timeout option to the Mocha grunt task; set to 10000.
Removed the individual test suite timeouts, for all server tests.
Also, added global timeout for Mocha gulp task.
Added a timeout of 10000 ms to each server test file. This is an attempt
to solve the timeout issues that we're experiencing with the Mocha
tests. Especially, this is hoping to address the build fails that are
caused by such timeouts.
Issue is described in https://github.com/meanjs/mean/issues/955
The bug was not exposed by the original test, since it was mixing two (related) aspects:
* An invalid Id (a badly formed mongodb identifier)
* An non-existent Id (an identifier with no corresponding document in the database)
Modifications:
- Fixed the message property in the article controller (the error message follows the wording of the error message in "users.password.server.controller.js", in case of username not found)
- Added a new test to check modifications and avoid regressions
