Eamena v1 v2 migration

[mradamcox]

Description of Change

Initial merge of support for the v1-v2 data migration operations.

The workflow at the time of this merge is

1. python manage.py convert_v1_data --prepare

   This step loads extra resource graph nodes that are necessary to support the slightly modified E27 for v2 data. Note that this step relies on changes to have been made to the package repo (EAMENA app), which are not in this PR. Specifically, the commits in this pr https://github.com/eamena-oxford/eamena-egypt-app/pull/1 must be applied to whichever app is being migrated before this --prepare command is run.

2. python manage.py convert_v1_data -s <path/to/v1data.json>

This will convert the input data into resources that should load into v2, but it will not load them directly.

3. python manage.py packages -o load_resources -s <path/to/new/v2data.json>

Standard loading resources process.

Issues Solved

Types of changes

• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• [ ] Unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)

Further comments