#787: data_creator.py, change 'id_value' -> 'id_entity'
#787: data_creator.py, remove redundant 'attribute' table
#787: data_creator.py, add foreign key to 'tbl_dataset_value'
#787: data_creator.py, add missing comma
#787: data_creator.py, change 'KEY' -> 'FOREIGN KEY'
Merge pull request #814 from jeff1evesque/python_data_creator

#787: Remove redundant table, and fix column