added an additional check, before populating NS when prefix=xml
added an additional check, before populating NS when prefix=xml

vcrhonek/openwsman,kkaempf/openwsman,Openwsman/openwsman,vcrhonek/openwsman,kolbma/openwsman,kolbma/openwsman,vcrhonek/openwsman,vcrhonek/openwsman,kkaempf/openwsman,kkaempf/openwsman,kolbma/openwsman,vcrhonek/openwsman,Openwsman/openwsman,kolbma/openwsman,kkaempf/openwsman,kolbma/openwsman,kkaempf/openwsman,Openwsman/openwsman,kolbma/openwsman,kkaempf/openwsman,Openwsman/openwsman,vcrhonek/openwsman,vcrhonek/openwsman,kolbma/openwsman,Openwsman/openwsman,Openwsman/openwsman,kkaempf/openwsman,Openwsman/openwsman