Adding vtkImagingCore python tests

Imaging/Core/Testing/Python/CMakeLists.txt

Imaging/Core/Testing/Python/ContinuousClose2D.py

Imaging/Core/Testing/Python/IdealHighPass.py

Imaging/Core/Testing/Python/LaplacianEdgeEnhance.py

Imaging/Core/Testing/Python/MultipleUpdateExtents.py

Imaging/Core/Testing/Python/ResliceBSpline.py

Imaging/Core/Testing/Python/ResliceColorWrap.py

Imaging/Core/Testing/Python/ResliceInformationInput.py

Imaging/Core/Testing/Python/ResliceInterpolationModes.py

Imaging/Core/Testing/Python/ResliceInterpolationOblique.py

Imaging/Core/Testing/Python/ResliceLanczosKaiser.py

Imaging/Core/Testing/Python/ResliceMirrorOblique.py

Imaging/Core/Testing/Python/ResliceMirrorPad.py

Imaging/Core/Testing/Python/ResliceOptimizationOff.py

Imaging/Core/Testing/Python/ReslicePermutations.py

Imaging/Core/Testing/Python/ReslicePermuteResample.py

Imaging/Core/Testing/Python/ReslicePermuteSlab.py

Imaging/Core/Testing/Python/ResliceSlabModes.py

Imaging/Core/Testing/Python/ResliceToColors.py

Imaging/Core/Testing/Python/ResliceWrapOblique.py