OOP Fixed helper data setup

Moved creation of stata dataset with nursing home imputations added
since reorganized to do before pull in oop datasets
Added indicator for having wage index to final dataset
Fixed dataset references in final stata do files
Added variable for total NH payments across all types
Minor sic updates

Fixed cause of death variable name where it is pulled in for the first
time.
Fixed a sort where the dod is pulled in from the claims data