psql ODBC CI - Fix MSI error messages (#58) Use the MSI property, not the WiX preprocessor variable (which was also wrongly used as a property name) so the product name actually appears in the error message instead of an empty string.

psql ODBC CI - Fix MSI error messages (#58) Use the MSI property, not the WiX preprocessor variable (which was also wrongly used as a property name) so the product name actually appears in the error message instead of an empty string. #154