Merge topic 'contour-tree-performance-improvements'

851c3271 Clean-up 0f CopyArrayByIndices and CopyVecArrayByIndices helpers
89fc3be8 Changed comment style to avoid warning
17caf7f3 Fixed incorrect filename in CMakeLists.txt
c3b3c44e Update CMakeLists.txt
b625ef7d Removed helper function for debugging
dffb7afb Clean-up. Move functor class outside template.
51f73704 Clean-up. Move functor class outside template.
74923266 Added missing const qualifier
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Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Kenneth Moreland <morelandkd@ornl.gov>
Merge-request: !2443