BUG: Load a second dataset does not properly reset

[gjwgit]

To Repeat

• Start Rattle
• Load DEMO
• Load rattle_test_large.csv
• Note that rec_id, ssn, medicare_number are not IDENT

A fresh start and load rattle_test_large:

After DEMO then load rattle_test_large

TARGET gets set okay.

[gjwgit]

Part of the problem is probably that the providers are not fully being reset to match the new dataset. After a fresh start, then DEMO, then FILENAME rattle_test_large.csv I see the following values for the providers. Related to #253

ROLES is missing and TYPES are for the DEMO dataset, not the rattle_test_large dataset!

[yixiangyin]

376

[gjwgit]

Closing this - the scenario described is now functional.