Reverse octree's depth first iterator order#2332

Merged

SergioRAgostinho merged 2 commits intoPointCloudLibrary:masterfrom frozar:octree_depth_first_iterator_order

Oct 8, 2018

+16-20

Commits on Oct 7, 2018

[TEST] Update the test 'Walk Through Octree' considering the
frozar
committed
[OCTREE] Fix the 'OctreeDepthFirstIterator<OctreeT>::operator++' be get the intuitive order.
frozar
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