octomap_ros: 0.4.0-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `octomap_ros` to `0.4.0-0`:

- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.2`
- previous version for package: `0.3.0-0`

## octomap_ros

```
* Dropped PCL support in favor of sensor_msgs::PointCloud2.
```