Cleanup reform_style removal and 738 migrations

[hdoupe]

Resolves #743

[hdoupe]

This PR involves no change in logic. It removes migrations added in PR #738 and adds them in a cleaner manner. Also, it adds the remove reform_style file in the exact same format as it is in the Heroku app databases.

This was tested locally with the following commands:

mkdir db_problem
cd db_problem/
git clone https://github.com/OpenSourcePolicyCenter/PolicyBrain
cd PolicyBrain/
git checkout v1.1.1 -b v1.1.1a
pushd deploy/ && ./install_taxbrain_server.sh && popd && source activate aei_dropq
python manage.py makemigrations
python manage.py migrate
git checkout -b v1.1.1b
echo replaced by identical file
rm webapp/apps/taxbrain/migrations/0055_remove_taxsaveinputs_reform_style.py
git pull origin pull/744/head:cleanup_738_migrations
source deactivate
conda env remove --name aei_dropq && pushd deploy/ && ./install_taxbrain_server.sh && popd && source activate aei_dropq
python manage.py makemigrations
python manage.py migrate

One more note to those who don't already know this: You really must include migration files in your pull requests. There are three databases that need to stay in sync: whatever you're running locally, the test database, and the production database. Using a common set of migration files helps to do this.

For more info see: https://www.algotech.solutions/blog/python/django-migrations-and-how-to-manage-conflicts/

[hdoupe]

I was able to successfully deploy this PR to the test server and run the migrations.