Userform and unittest

Combined userform for user ans systeruser
[PEP8](http://legacy.python.org/dev/peps/pep-0008/#imports) recommends:
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Imports should be grouped in the following order:

1. standard library imports
2. related third party imports
3. local application/library specific imports

You should put a blank line between each group of imports.
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So it should be:
```python
from django import forms
from django.contrib.auth.models import User
from django.forms.models import model_to_dict, fields_for_model

from dashboard.models import SysterUser
```

Also a good practice is to keep imports in alphabetical order, that way other contributors will find it easy to decide where to include the imports.