rocon_multimaster: 0.7.2-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `rocon_multimaster` to `0.7.2-0`:

- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.5`
- previous version for package: `0.7.0-0`

## rocon_gateway_tests

```
* added missing zeroconf_avahi dependency.
* relax timeout durations for tests.
```