vision_visp: 0.7.3-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `vision_visp` to `0.7.3-0`:

- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.2`
- previous version for package: `0.7.2-0`

## vision_visp

```
* hydro-0.7.2
* Contributors: Thomas Moulard
```

## visp_auto_tracker

```
* Fix to install model folder
* hydro-0.7.2
* Contributors: Fabien Spindler
```

## visp_bridge

```
* hydro-0.7.2
* Prepare changelogs
* Fix various dependency issues in the CMakeLists.txt and package.xml files
* Merge branch 'hydro-devel' into hydro
* Add missing dependency to ViSP
* hydro-0.7.1
* Prepare changelogs
* Fix errors detected with catkin_lint
* hydro-0.7.0
* Run catkin_generate_changelog, catkin_tag_changelog, bump version to 0.6.0
* Contributors: Fabien Spindler, Thomas Moulard
```

## visp_camera_calibration

```
* hydro-0.7.2
* Contributors: Fabien Spindler
```

## visp_hand2eye_calibration

```
* hydro-0.7.2
* Prepare changelogs
* Contributors: Fabien Spindler, Thomas Moulard
```

## visp_tracker

```
* hydro-0.7.2
* Prepare changelogs
* Reorganize launch files and fix since viewer and client nodes where renamed due to catkin_lint errors
* Contributors: Fabien Spindler
```