Moved tests in proper place and Fixed imports from self

Moved tests in proper place and Fixed imports from self


This commit imitates : 
https://github.com/django/django-localflavor-ch/commit/3a802509084738052909c7202dd502f5201ed147

https://github.com/django/django-localflavor-ch/commit/9a153ca57b5ad6d2620a37c3f08fb77f5674c955