Fix Hello MoveIt copy in Dockerfile (moveit#781)

.docker/Dockerfile

@@ -32,7 +32,7 @@ RUN . "/opt/ros/${ROS_DISTRO}/setup.sh" &&\
 
 # Remove the hello_world tutorial cpp file and replace it with the planning_around_objects file
 RUN rm src/hello_moveit/src/hello_moveit.cpp
-COPY ./doc/tutorials/planning_around_objects/hello_moveit_kinova.cpp src/hello_moveit/src/hello_moveit.cpp
+COPY ./doc/tutorials/planning_around_objects/hello_moveit.cpp src/hello_moveit/src/hello_moveit.cpp
 
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