BUG #14284: Fixing LUT with white point in middle.

As discussed on the bug report, adding a white-point in the middle of the
default lookup table to overcome the shifting whitepoint problem as user added
new control points.

Change-Id: I49525d55a497d2b499d7cac63eee9911a9aa8793
Merge topic '0014284_fix_color_map' into next

4276a98 BUG #14284: Fixing LUT with white point in middle.