Updated the measure evaluation validator code to use the new method signature for ProductTest#Execute
Merge pull request #108 from okeefm/roundtrip_update_for_refactor

Updated the measure evaluation validator code
Fixed a collection_fixtures call for PatientZipperTest
Fixed format of Cat 1 'execute' call
Added product and vendor collection_fixtures calls to patient_zipper_test
Merge pull request #110 from okeefm/measure_evaluation_fix_2

Fixed format of Cat 1 'execute' call
Merge pull request #109 from okeefm/zipper_test_fix

Fixed a collection_fixtures call for PatientZipperTest
Updated format of error string in check_population