Need to consolidate default gen3 dicts #21
Description
Currently the gen3 default dictionary resides here:
https://github.com/uc-cdis/dcfdictionary/tree/master/gdcdictionary/schemas
However, it does not have core_metadata_collection which is a required link for all data_file entities.
Also, the metaschema is in a completely different repo, which is here: https://github.com/uc-cdis/dictionaryutils/tree/master/dictionaryutils/schemas
dictionaryutils also adds a data_release.yaml schema whenever you use dictionaryutils.DataDictionary(). This yaml should also be in a central location.
Finally, with our own testing, the default dictiionary in dcfdictionary had problems with deployment. We will need to test this again, to figure out what is causing it and update the schemas.