Bug - Non-Ascii character in branch name causes worker to crash

Description

If there is a non ascii character in the branch name, the Unzipper will not work and causes the worker to crash.

Priority - High

The project can no longer be analyzed. If a student uses any strange character as a folder name (which is somewhat likely) the worker will crash. This is undesirable

Definition of done

When the worker can unzip a zip containing a non-unicode character.