Create integration test for reliability

[TimonPost]

Task Description

Currently, we haven't really validated the guaranteed reliabity yet. We do have unit tests but it would be nice to see an integration test that uploads a 10..50MB file to another endpoint where after it validates the transferred file.

We already have a test environment set up in /bin which can be used for this purpose.

Task TODO

• [ ] Add file transfer test here
• [ ] Create similar function as this one
• [ ] Make sure the file get's validated on the server