Input files for testing frontier functions:

frontier-creds.txt -- credentials to use for testing frontier
frontier-searches.txt -- role expressions from which to perform all three frontier searches
issuer-tracable.txt -- issuer-tracable role names
sensitive.txt -- roles Alice considers sensitive


Desired output files:

frontier-desired-simp-output.txt 
frontier-desired-oppo-output.txt
frontier-desired-sens-output.txt