rocon_msgs: 0.7.1-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `rocon_msgs` to `0.7.1-0`:

- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.2`
- previous version for package: `0.7.0-0`

## concert_msgs

```
* Next iteration of role manager messages and services (#26 <https://github.com/robotics-in-concert/rocon_msgs/pull/26>).
```

## concert_service_msgs

```
* rocon_service -> concert_service
* Contributors: Daniel Stonier
```

## rocon_interaction_msgs

```
* get roles moved completely to a service.
* int32, not 8
* unlimited interactions constant.
```

## rocon_msgs

```
* rocon_service -> concert_service
* Contributors: Daniel Stonier
```

## rocon_std_msgs

```
* igloo -> indigo
* rocon_service -> concert_service
* Contributors: Daniel Stonier
```

## rocon_tutorial_msgs

```
* moved tutorial messages to service messages.
* turtlesim v2 messages.
* Contributors: Daniel Stonier
```

## scheduler_msgs

```
* updated invalid error code comment
* convenience string for introspecting on the reason errors.
* changelog entries fixed.
* Contributors: Daniel Stonier
```