BUG: Do not to render labels for strain flavor matrix.

Testing with current VTK master, 6.1.X, this appears broken.  Unsure of the cause.
BUG: Update TestOneSheetedHyperboloid for VTK6 framework.
BUG: Update TestSphere to VTK6 testing framework.
BUG: Update TestTwoSheetedHyperboloid for VTK6 framework.
BUG: Update TestUniAxialLoading to VTK6 framework.