Use a global absolute import for RequestFactory
Use a global absolute import for RequestFactory

For some reason, this relative import is broken when trying to start
pyLoad. By using an absolute import, it gets fixed. Also, moved to the
beginning of the file, as it seems there are no circular dependencies.

Relevant error:
```
CRITICAL  find_module() takes exactly 2 arguments (3 given)
```

pyblub/pyload,pyblub/pyload