GEOPY-1971: Octree mesh upside down (backport for Analyst 4.5.1)

[domfournier]

GEOPY-1971 - Octree mesh upside down (backport for Analyst 4.5.1)
(cherry picked from commit 6e6806c)

[codecov]

Codecov Report

Attention: Patch coverage is 45.45455% with 6 lines in your changes missing coverage. Please review.

Project coverage is 90.64%. Comparing base (0ed8adc) to head (71d69a2).
Report is 3 commits behind head on hotfix/0.10.1.

Files with missing lines	Patch %	Lines
geoh5py/objects/octree.py	33.33%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           hotfix/0.10.1     #695      +/-   ##
=================================================
- Coverage          90.73%   90.64%   -0.10%     
=================================================
  Files                107      107              
  Lines               9052     9061       +9     
  Branches            1682     1685       +3     
=================================================
  Hits                8213     8213              
- Misses               452      458       +6     
- Partials             387      390       +3     

Files with missing lines	Coverage Δ
geoh5py/objects/grid_object.py	100.00% <100.00%> (+3.70%)	⬆️
geoh5py/objects/octree.py	85.71% <33.33%> (-4.03%)	⬇️

... and 1 file with indirect coverage changes