Switch to the system-provided version of octomap.

This ensures that we have a consistent ABI between this
package and any other packages in the system that use it.
We'll eventually be removing the ROS-provided octomap
package to ensure we don't run into future problems.

Signed-off-by: Chris Lalancette <clalancette@gmail.com>

Author: clalancette

package.xml

@@ -21,7 +21,7 @@
   <depend>libqt5-gui</depend>
   <depend>libqt5-widgets</depend>
   <depend>octomap_msgs</depend>
-  <depend>octomap</depend>
+  <depend>liboctomap-dev</depend>
   <depend>qtbase5-dev</depend>
   <depend>rclcpp</depend>
   <depend>rviz_common</depend>