Added some XQuery node update tests.
Added some XQuery node update tests.

svn path=/trunk/eXist/; revision=5372

ljo/exist,jessealama/exist,windauer/exist,eXist-db/exist,jensopetersen/exist,windauer/exist,wolfgangmm/exist,wshager/exist,wolfgangmm/exist,olvidalo/exist,zwobit/exist,zwobit/exist,wolfgangmm/exist,shabanovd/exist,jessealama/exist,olvidalo/exist,ambs/exist,hungerburg/exist,wolfgangmm/exist,hungerburg/exist,hungerburg/exist,jessealama/exist,windauer/exist,shabanovd/exist,eXist-db/exist,opax/exist,dizzzz/exist,windauer/exist,jensopetersen/exist,zwobit/exist,RemiKoutcherawy/exist,ambs/exist,dizzzz/exist,lcahlander/exist,joewiz/exist,RemiKoutcherawy/exist,kohsah/exist,eXist-db/exist,dizzzz/exist,ambs/exist,opax/exist,RemiKoutcherawy/exist,RemiKoutcherawy/exist,wolfgangmm/exist,ljo/exist,opax/exist,patczar/exist,adamretter/exist,hungerburg/exist,dizzzz/exist,wshager/exist,wshager/exist,wolfgangmm/exist,lcahlander/exist,ljo/exist,olvidalo/exist,opax/exist,eXist-db/exist,eXist-db/exist,kohsah/exist,joewiz/exist,zwobit/exist,MjAbuz/exist,ljo/exist,patczar/exist,windauer/exist,ambs/exist,kohsah/exist,adamretter/exist,MjAbuz/exist,ambs/exist,joewiz/exist,ljo/exist,hungerburg/exist,jensopetersen/exist,jessealama/exist,shabanovd/exist,olvidalo/exist,adamretter/exist,dizzzz/exist,joewiz/exist,olvidalo/exist,kohsah/exist,zwobit/exist,adamretter/exist,patczar/exist,patczar/exist,opax/exist,shabanovd/exist,lcahlander/exist,wshager/exist,joewiz/exist,patczar/exist,wshager/exist,ljo/exist,MjAbuz/exist,joewiz/exist,patczar/exist,jensopetersen/exist,eXist-db/exist,MjAbuz/exist,dizzzz/exist,adamretter/exist,jessealama/exist,jensopetersen/exist,lcahlander/exist,kohsah/exist,RemiKoutcherawy/exist,shabanovd/exist,lcahlander/exist,shabanovd/exist,MjAbuz/exist,jessealama/exist,RemiKoutcherawy/exist,kohsah/exist,windauer/exist,MjAbuz/exist,zwobit/exist,adamretter/exist,jensopetersen/exist,wshager/exist,ambs/exist,lcahlander/exist