Need to fix testings mechanism.

[lsetiawan]

The current testing mechanism doesn't work, need to update to having folder called tests then how it's implemented, I'm not quite sure. I need @ocefpaf assistance on this.

See #73 (comment) and https://travis-ci.org/ODM2/ODM2RESTfulWebServices/jobs/324673995#L1817

[lsetiawan]

I think this is now fixed. See #76 (comment). Though I still need to research the best practice to do Django reusable app testing.