Move waived flags to known issues in DataWarehouse
As part of switching from the "waived" flag to "known issues", create the equivalents of all the current "waived" flags in kpet-db as "known issues" in the DataWarehouse. Once it's verified that the issues are identifying the waived cases correctly, remove all the "waived" flags from kpet-db.
Requires cki-project/datawarehouse#336