Make circular motion in example more compatible (UniversalRobots#508)

This motion should work on

- UR5
- UR5e
- UR20

These are all the models we currently use during tests.

Author: urfeex

examples/instruction_executor.cpp

@@ -138,10 +138,11 @@ int main(int argc, char* argv[])
 
   // For moveC via and target can be a Pose or Q. When brace-init style lists are given, values are
   // interpreted as Pose.
-  instruction_executor->moveC(urcl::Pose{ -0.1, 0.463, 0.559, 0.68, -1.083, -2.076 },
-                              urcl::Pose{ -0.3203, 0.303, 0.559, 0.68, -1.083, -2.076 });
-  instruction_executor->moveC(urcl::Pose{ -0.1, 0.463, 0.559, 0.68, -1.083, -2.076 },
-                              urcl::Q{ -1.57, -1.83, 1.707, -0.833, 0.782, 0.479 });
+  instruction_executor->moveP(urcl::Pose{ -0.2, 0.5, 0.5, 0.68, -1.083, -2.076 }, 0.2, 0.2);
+  instruction_executor->moveC(urcl::Pose{ -0.2, 0.4, 0.4, 0.68, -1.083, -2.076 },
+                              urcl::Pose{ -0.2, 0.4, 0.6, 0.68, -1.083, -2.076 });
+  instruction_executor->moveC(urcl::Pose{ -0.2, 0.5, 0.5, 0.68, -1.083, -2.076 },
+                              urcl::Q{ -1.84, -1.8, 2.7, 4.2, 0.6, -4.0 });
 
   // For optimove functions, the same target rules as for moveJ and moveL apply.
   instruction_executor->optimoveJ({ -1.57, -1.6, 1.6, -0.7, 0.7, 0.2 }, 1.0, 1.0);