Too many tests! If the macro `__OPTIMIZE__` evaluates to true, the random testing
computes 1M tests. That is too much.
Here the test was killed, after 20 minutes, after 1M iterations with `Cartesian<double>` and 954K iterations with
`Homogeneous<MP_Float>`:
https://cgal.geometryfactory.com/CGAL/Members/testsuite/CGAL-4.7-Ic-128/Intersections_3/TestReport_lrineau_x86-64_Linux-Fedora19_llvm-clang-with-g++-4.8.gz
100K tests should be enough, and will decrease the CPU consumption by a
factor of 10.
...Actually, I am not at all convinced that those random tests are
useful! And why do we use random tests for Bbox_3/Triangle_3 and for no
other pairs of CGAL objects?
Laurent Rineau
d77da3f15b