Update distro source

build.xml

@@ -37,7 +37,7 @@
 
   <target name="test" depends="antversion-test, xar">
     <!-- this path may be and is subject to change! -->
-    <get src="https://github.com/eXist-db/exist/releases/download/eXist-${project.processorversion}/exist-distribution-${project.processorversion}-unix.tar.bz2" 
+    <get src="https://gitlab.gwdg.de/api/v4/projects/20809/packages/generic/exist-distribution/${project.processorversion}/exist-distribution-${project.processorversion}-unix.tar.bz2" 
       dest="${build.dir}/eXist-db-${project.processorversion}.tar.bz2" 
       skipexisting="true"/>    
     <untar src="${build.dir}/eXist-db-${project.processorversion}.tar.bz2" dest="${test.dir}" compression="bzip2" />