Upgrade to Django 1.9

[scottx611x]

https://docs.djangoproject.com/en/dev/releases/1.9/
https://docs.djangoproject.com/en/dev/internals/deprecation/#deprecation-removed-in-1-9
https://www.djangoproject.com/download/#supported-versions

Depends on: #2614, #2618

Deprecations:

• django_extensions: Django 1.8 features a native UUIDField, this UUIDField will be removed after Django 1.7 becomes unsupported (Move from django_extensions UUIDField to Django UUIDField #2592)
• Automatic syncing of apps without migrations will be removed. Migrations will become compulsory for all apps unless you pass the --run-syncdb option to migrate.
• Support for automatic loading of initial_data fixtures and initial SQL data will be removed.
• Passing callable arguments to querysets will no longer be possible.
• Update PostgreSQL backend name
• Update Django URL Patterns (Update Django URL Patterns #2593)
• RemovedInDjango19Warning: django.db.models.get_model is deprecated: core/search_indexes.py:41 and core/search_indexes.py:189 (from django.apps import apps: https://stackoverflow.com/questions/36234635/what-is-the-equivalent-of-django-db-models-loading-get-model-in-django-1-9)

Pre-existing to do items:

• replace MIGRATION_MODULES with a dict after Django 1.9 upgrade in quick_test.py

New features to consider:

• Password validation
• Permission mixins for class-based views for data_set_manager/views.py
• Running tests in parallel

Update django* Python packages (upgrading django-extensions to v2.1.0 requires switching to Django native UUIDField).

[scottx611x]

Django Upgrade

[mccalluc]

#804