ros_tutorials: 0.5.2-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `ros_tutorials` to `0.5.2-0`:

- upstream repository: git@github.com:ros/ros_tutorials.git
- release repository: https://github.com/ros-gbp/ros_tutorials-release.git
- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.16`
- previous version for package: `0.5.1-1`

## ros_tutorials

- No changes

## roscpp_tutorials

- No changes

## rospy_tutorials

```
* update code style of examples (#18 <https://github.com/ros/ros_tutorials/pull/18>, #19 <https://github.com/ros/ros_tutorials/pull/19>)
```

## turtlesim

- No changes