ENH: Restore missing Infovis classes

A number of classes in Infovis/Core were not being compiled. This patch:
1) Moves vtkConvexHull2D and vtkGraphAnnotatedLayersFilter to
Rendering/Annotation.
2) Reinstates tests for vtkConvexHull2D, vtkDotProductSimilarity,
vtkArrayNorm
3) Removes unused test for TestTimePoint. The vtkTimePointUtility is
already tested in Common/Core.

Change-Id: I51c23a20897590531435f784602570865ebcb22b
Merge topic 'MissingInfovisClasses' into master

bac2c9cf ENH: Restore missing Infovis classes