Remove enum GJKSolverType and related class attributes.

include/hpp/fcl/collision_data.h

src/collision.cpp

src/collision_data.cpp

src/distance.cpp

test/box_box_distance.cpp

test/capsule_box_1.cpp

test/capsule_box_2.cpp

test/geometric_shapes.cpp

test/shape_mesh_consistency.cpp

test/utility.cpp

test/utility.h