test: Speed up tests by more than 500%

[abhiabhi94]

• use django's SimpleTestCase wherever database access is not required.
• use a separate module for testing that is lesser secure but faster.

[abhiabhi94]

For some unscientific comparisons, these are the results when run on my machine:

Before:

Ran 395 tests in 68.571s

After:

Ran 395 tests in 10.824s

[abhiabhi94]

I have created a separate settings module for tests because I thought you @Radi85, use the current one for live demo. In case you don't, I can make the changes directly to the original settings module.

[Radi85]

I have created a separate settings module for tests because I thought you @Radi85, use the current one for live demo. In case you don't, I can make the changes directly to the original settings module.

Yes I am using it in the live demo.

[Radi85]

Well done!