shadow_robot_ethercat: 1.3.4-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `shadow_robot_ethercat` to `1.3.4-0`:

- upstream repository: https://github.com/shadow-robot/sr-ros-interface-ethercat.git
- release repository: https://github.com/shadow-robot/sr-ros-interface-ethercat-release.git
- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.11`
- previous version for package: `1.3.0-2`

## shadow_robot_ethercat

- No changes

## sr_edc_controller_configuration

- No changes

## sr_edc_ethercat_drivers

```
* remove redundant message
```

## sr_edc_launch

- No changes

## sr_edc_muscle_tools

- No changes

## sr_external_dependencies

- No changes

## sr_robot_lib

```
* Cosmetic changes in hand driver code.
```