[MOD] adapted bucket cleaner


git-svn-id: https://svn.uni-konstanz.de/disy/Treetank/trunk/treetank@7531 e3ddb328-5bfe-0310-b762-aafcbcbd2528
[MOD] replacing all *nodes* with *data* to mark the difference..we are not storing only nodes any more


git-svn-id: https://svn.uni-konstanz.de/disy/Treetank/trunk/treetank@7532 e3ddb328-5bfe-0310-b762-aafcbcbd2528
Merge remote-tracking branch 'refs/remotes/git-svn'