Remove some redundancy from collection.xconf schema.
Remove some redundancy from collection.xconf schema.

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