Updated svn:externals to point to xdbm-refactoring branches. Only links to apacheds and shared were changed as no changes are expected in the other projects

git-svn-id: https://svn.apache.org/repos/asf/directory/apacheds/branches/xdbm-refactoring-with-dependencies@945840 13f79535-47bb-0310-9956-ffa450edef68
tree: 09ac4553a4a7cc09ce5d50b9a40357f27a652c0e
  1. NOTICE.txt
  2. README.txt
  3. pom.xml