* python-django.el (python-django-qmgmt-open-migration-callback):
Fix typo and delete testing code.
Use python-shell-interpreter to ease configuration.

* python-django.el (python-django-qmgmt-open-migration-callback):
Fix typo and delete testing code.
(python-django-python-executable): Remove var.
(python-django--help-get, python-django-info-get-version)
(python-django-info-get-settings, python-django-info-get-setting)
(python-django-info-get-app-paths, python-django-info-module-path)
(python-django-mgmt-make-comint, python-django-open-project): Use
python-shell-interpreter.