User's files are deleted when running the test suite.

[DePierre]

Because of owtf/owtf#367 the functionnal test project has to use OWTF default profiles. Therefore, and because OWTF needs to have a clean test environment by deleting all previous runs, the user's files (database, owtf_review) are deleted.

Need to fix that as soon as OWTF's issue is fixed.