Fails when providing enums

[swiftsword94]

fails when providing schema with enums:

https://github.com/CMSgov/price-transparency-guide/blob/master/schemas/in-network-rates/in-network-rates.json

-> if jsonschema.get(ROOT_IDENTIFIER_FIELD) is not None:
(Pdb) p jsonschema.get(ROOT_IDENTIFIER_FIELD)
*** AttributeError: 'list' object has no attribute 'get'

jsonschema2sql.py line 163