fix visualization topics

Author: juliangaal

rviz/demo.rviz

@@ -110,7 +110,7 @@ Visualization Manager:
       Size (Pixels): 3
       Size (m): 0.10000000149011612
       Style: Flat Squares
-      Topic: /demo/ground
+      Topic: /ground_segmentation/ground
       Unreliable: false
       Use Fixed Frame: true
       Use rainbow: true
@@ -138,7 +138,7 @@ Visualization Manager:
       Size (Pixels): 3
       Size (m): 0.10000000149011612
       Style: Flat Squares
-      Topic: /demo/nonground
+      Topic: /ground_segmentation/nonground
       Unreliable: false
       Use Fixed Frame: true
       Use rainbow: true