Fix class name conflict
Fix class name conflict

Looks like PHP 5.6.x doesn't like name conflicts.

\Sabre\DAV\Server would overlap with \OC\Connector\Sabre\Server.

michaelletzgus/nextcloud-server,pollopolea/core,IljaN/core,sharidas/core,owncloud/core,pmattern/server,sharidas/core,pixelipo/server,whitekiba/server,lrytz/core,owncloud/core,whitekiba/server,jbicha/server,IljaN/core,nextcloud/server,xx621998xx/server,pmattern/server,IljaN/core,michaelletzgus/nextcloud-server,pixelipo/server,andreas-p/nextcloud-server,cernbox/core,pollopolea/core,phil-davis/core,endsguy/server,jbicha/server,whitekiba/server,pollopolea/core,IljaN/core,owncloud/core,endsguy/server,pollopolea/core,whitekiba/server,IljaN/core,Ardinis/server,nextcloud/server,cernbox/core,andreas-p/nextcloud-server,owncloud/core,lrytz/core,lrytz/core,bluelml/core,owncloud/core,bluelml/core,andreas-p/nextcloud-server,pollopolea/core,lrytz/core,sharidas/core,xx621998xx/server,nextcloud/server,xx621998xx/server,bluelml/core,bluelml/core,endsguy/server,pixelipo/server,Ardinis/server,whitekiba/server,jbicha/server,Ardinis/server,sharidas/core,nextcloud/server,michaelletzgus/nextcloud-server,jbicha/server,Ardinis/server,cernbox/core,bluelml/core,pmattern/server,andreas-p/nextcloud-server,endsguy/server,lrytz/core,pmattern/server,michaelletzgus/nextcloud-server,sharidas/core,xx621998xx/server,cernbox/core,andreas-p/nextcloud-server,xx621998xx/server,Ardinis/server,endsguy/server,pixelipo/server,jbicha/server,pmattern/server,cernbox/core,pixelipo/server