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`PR:106 update get_schemas calls <https://github.com/4dn-dcic/dcicwrangling/pull/106>_`
* update to use get_schemas function from dcicutils rather than having a 'broken' redundant copy
* same for dump_json_data function
* updated notebooks to call dcicutils versions of functions
* simplify get_schemas_names_and_fields to use dcicutil function