Deprecations and cleanups

[benkonrath]

• More work on depreciations (see Depricate non pep8 compliant class and method names #258).
• Drop support for Django 1.9
• Small cleanup for IBAN tests.

[codecov-io]

Codecov Report

Merging #305 into master will decrease coverage by 0.01%.
The diff coverage is 96.29%.

@@            Coverage Diff             @@
##           master     #305      +/-   ##
==========================================
- Coverage    96.3%   96.28%   -0.02%     
==========================================
  Files         152      152              
  Lines        4221     4230       +9     
  Branches      579      579              
==========================================
+ Hits         4065     4073       +8     
- Misses         97       98       +1     
  Partials       59       59

Impacted Files	Coverage Δ
localflavor/generic/forms.py	100% <ø> (ø)	⬆️
localflavor/generic/models.py	100% <ø> (+2.27%)	⬆️
localflavor/tr/forms.py	87.27% <100%> (ø)	⬆️
localflavor/nl/models.py	100% <100%> (ø)	⬆️
localflavor/pk/forms.py	100% <100%> (ø)	⬆️
localflavor/be/forms.py	100% <100%> (ø)	⬆️
localflavor/no/forms.py	88.04% <100%> (ø)	⬆️
localflavor/in_/forms.py	96.87% <100%> (ø)	⬆️
localflavor/pt/forms.py	100% <100%> (ø)	⬆️
localflavor/ch/forms.py	88.88% <100%> (ø)	⬆️
... and 26 more

---

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[claudep]

Fine, but do we gain anything by removing 1.9 support? If not, I wonder if it's worth it.

[benkonrath]

There's no specific gain for dropping support for 1.9 except being explicit about not supporting version of Django that are no longer supported. I'll remove this change for now.

[claudep]

I see your point. But as we generally gain nothing technically when dropping "intermediate" unsupported releases, my opinion is that we should keep that support. But this is in no way a final decision and this might be the subject of further discussions (e.g. on django-developers).

[benkonrath]

Yeah, I understand it's just your opinion and I also see your point. For me it's not really a big deal either way - I dropped 1.9 support to save me a bit of time waiting for CI test and because I don't want to fix any bugs in old versions of Django. But we can just decide to drop support if or when 1.9 (or any other unsupported version) is holding us back like we have in the past.