Fixed multiple issues

[MrTiz]

1. Added category_uuid to _filterset_tags in tenable/io/tags.py
2. Added support for encrypted NessusDB reports
3. Fixed bug when uploading an encrypted file

[aseemsavio]

There seems to be failing tests..

[MrTiz]

There seems to be failing tests..

Hi @aseemsavio, the code I modified in the file file.py works, I tested it myself, the problem is in the unit test, however I am not able to solve it. The current version of the file file.py does not work correctly when trying to load an encrypted file. You can test it yourself by trying to use the pytenable library to do the import of an encrypted Nessus DB report, you will get error 500 Internal Server Error returned by Tenable.io.

Please help me to fix this bug. Thanks.

[SteveMcGrath]

@MrTiz may I suggest the following change to the test suite to allow it to pass?

a3b3be1