[#3597] - SimpleWriterExporterOutput does NOT consider default encoding property

The new class net.sf.jasperreports.export.SimpleWriterExporterOutput does not consider the default character encoding property "net.sf.jasperreports.export.character.encoding".

If one does not specifiy the encoding explicitly then the SimpleWriterExporterOutput uses hardcoded "UTF-8", but NOT the encoding from the property "net.sf.jasperreports.export.character.encoding" (that may specific something quite different than UTF-8).