Obsolete default namespace declaration when create element with default namespace URI

When qualified element with default namespace URI is created then xerces adds (obsolete) default namespace declaration to it.

It looks like bug in `dom\impl\DOMLSSerializerImpl.cpp: line 891`
namespaceMap->put((void*)attribute->getLocalName(),(XMLCh*)attribute->getNodeValue());
should be:
namespaceMap->put((void*)nsPrefix,(XMLCh*)attribute->getNodeValue());