moveit_plugins: 0.5.6-1 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `moveit_plugins` to `0.5.6-1`:

- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.8`
- previous version for package: `0.5.6-0`

## moveit_fake_controller_manager

- No changes

## moveit_plugins

- No changes

## moveit_simple_controller_manager

```
* Allow simple controller manager to ignore virtual joints without failing
* Contributors: Dave Coleman
```