refs #2 - Fixed broken mongo tests

* Proper codeformatting
* Using collection::drop() instead of deprecated Mongo::dropCollection()
* checking collection status before droping to fix test
refs Codeception/Codeception#143 - Removed broken test folder
Merge pull request #146 from omares/origin-143

refs #143 - Removed broken test folder
Merge pull request #144 from omares/2

Fixed broken mongo tests