WARNING: This will involve a minor migration.
Fixing the hash value length on the model to be correct.
Have made the hash function more sensible, and also not
bound to the required field on actions. Needed for how
stacktask-odoo handles dynamic required fields.
gitignore updated as venv is needed to build migrations
easily.
Hashing now also properly supports actions with no set
serializer.
Change-Id: I12f3ad759aaab4c3796e11c359e1ebcbf3ef4e77
b6316e5965