gazebo_ros_pkgs: 2.4.6-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `gazebo_ros_pkgs` to `2.4.6-0`:

- upstream repository: https://github.com/ros-simulation/gazebo_ros_pkgs.git
- release repository: https://github.com/ros-gbp/gazebo_ros_pkgs-release.git
- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.11`
- previous version for package: `2.4.5-0`