gps_umd: 0.1.7-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `gps_umd` to `0.1.7-0`:

- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.6`
- previous version for package: `0.1.6-0`

## gpsd_client

```
* Fix a segfault when there is no GPS fix: time will be NaN which causes the ROS timestamp message to throw a Boost rounding exception.
* Contributors: Stuart Alldritt
```