Created initial test for ImageToContourFilter
WIP test comparision of surfaces
Finished test
Finished test for ReduceContourSetFilter
Renamed test files
Renamed test files
Added test for contour normals computation
Fixed normals computation for contours with holes
Changed files paths and renamed test and reference files
Removed PlanarFigureMapper3D.

Use PlanarFigureVtkMapper3D by setting "planarfigure.3drendering" property to true.
Fixed string comparison with environment variable.
Merge branch 'bug-17490-use-env-vars-for-options'
Added test for distance image interpolation
Moved surface interpolation test into module SurfaceInterpolation
Use the correct variable for auto-load dependencies.
Fix application and provisioning file names due to past renaming.
Rename MITKPluginGenerator to MitkPluginGenerator for consistency.
Merge branch 'bug-17384-rename-plugin-generator'
Merge branch 'bug-17521-fix-installing-autoload-modules'
Merge branch 'bug-17078-test-for-ImageToContourFilter' into bug-17077-test-for-surface-interpolation