'Open a scanner for a given prefix.  That is all rows will have the specified
prefix. No other rows will be returned.
@return scanner id to use with other scanner calls
Parameters:
- tableName: name of table
- startAndPrefix: the prefix (and thus start row) of the keys you want
- columns: the columns you want returned
- attributes: Scan attributes'

def scannerOpenWithPrefix(self, tableName, startAndPrefix, columns, attributes):

    pass
