Removed an older version of tree test and added a new one
Removed an older version of tree test and added a new one

darcyliu/mlpack,minhpqn/mlpack,erubboli/mlpack,datachand/mlpack,trungda/mlpack,ranjan1990/mlpack,minhpqn/mlpack,ajjl/mlpack,Azizou/mlpack,darcyliu/mlpack,BookChan/mlpack,ranjan1990/mlpack,theranger/mlpack,thirdwing/mlpack,ersanliqiao/mlpack,chenmoshushi/mlpack,erubboli/mlpack,chenmoshushi/mlpack,bmswgnp/mlpack,bmswgnp/mlpack,stereomatchingkiss/mlpack,palashahuja/mlpack,theranger/mlpack,ajjl/mlpack,stereomatchingkiss/mlpack,ajjl/mlpack,chenmoshushi/mlpack,lezorich/mlpack,BookChan/mlpack,thirdwing/mlpack,lezorich/mlpack,ersanliqiao/mlpack,Azizou/mlpack,BookChan/mlpack,minhpqn/mlpack,datachand/mlpack,erubboli/mlpack,Azizou/mlpack,darcyliu/mlpack,thirdwing/mlpack,trungda/mlpack,lezorich/mlpack,ranjan1990/mlpack,trungda/mlpack,theranger/mlpack,bmswgnp/mlpack,stereomatchingkiss/mlpack,palashahuja/mlpack,ersanliqiao/mlpack,palashahuja/mlpack,datachand/mlpack