Enhancement suggestion: add object path to output of explainaccess.py with -u argument

[dwstern]

explainaccess.py can report the effective access of a folder (identified by its folder path using the -f parameter) or other object (which can be a folder, a report etc, identified by its objectURI using the -u parameter).

The optional -p parameter tells explainaccess.py to prefix each row of output with the path (the same path that was passed in, if the -f parameter was used, or the objectURI if the -u parameter was used).

Suggest enhancing the code so that if the object whose permissions we want to explain is identified using -u objectURI, use the new getpath() sharedfunction to report the object's actual path, perhaps suffixed with its name and type, in addition to or instead of the object URI. Need to make sure the output columns are consistent between -f and -u use cases.