Select internal tetra tessellation based on scalar change

Change-Id: I3587a17f9135f83207442e44e80936d7cec480c1
New data file for QuadraticTetra

Change-Id: I0e106acfca5e003bfc6bb5290426c850884b5be7
Alternative test image

Change-Id: I2dea89829f59aa7d909d8263ea1fab07b339e77f
Merge topic '0013827-Quadratic-Tetra' into master

e0421954 Alternative test image
5eec2e23 New data file for QuadraticTetra
5111dc45 Select internal tetra tessellation based on scalar change