[release] Set version for 5.0.0-RC1 release
[release] Set version for 5.0.0-RC1 release

olvidalo/exist,ambs/exist,hungerburg/exist,wolfgangmm/exist,ljo/exist,opax/exist,eXist-db/exist,ljo/exist,lcahlander/exist,lcahlander/exist,opax/exist,wolfgangmm/exist,ambs/exist,ambs/exist,adamretter/exist,olvidalo/exist,lcahlander/exist,windauer/exist,lcahlander/exist,hungerburg/exist,olvidalo/exist,wolfgangmm/exist,opax/exist,dizzzz/exist,wolfgangmm/exist,eXist-db/exist,ambs/exist,dizzzz/exist,dizzzz/exist,windauer/exist,olvidalo/exist,windauer/exist,opax/exist,adamretter/exist,opax/exist,ljo/exist,ljo/exist,ambs/exist,adamretter/exist,windauer/exist,olvidalo/exist,dizzzz/exist,dizzzz/exist,ljo/exist,lcahlander/exist,eXist-db/exist,eXist-db/exist,adamretter/exist,ljo/exist,dizzzz/exist,adamretter/exist,wolfgangmm/exist,adamretter/exist,wolfgangmm/exist,lcahlander/exist,ambs/exist,hungerburg/exist,windauer/exist,hungerburg/exist,hungerburg/exist,eXist-db/exist,eXist-db/exist,windauer/exist