Fix failing sla tree tests

Try to increase number of rays in Beam to prevent colisions


Put back threshold for intersections with model in sla tree tests 


Increase safety distance for branching tree instead of increasing rays

tests/sla_print/sla_test_utils.hpp

@@ -60,7 +60,7 @@ struct SupportByproducts
     std::string             obj_fname;
     std::vector<float>      slicegrid;
     std::vector<ExPolygons> model_slices;
-    sla::SupportTreeBuilder supporttree;
+    sla::SupportTreeBuilder suptree_builder;
     TriangleMesh            input_mesh;
 };