ros_ethercat: 0.1.6-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `ros_ethercat` to `0.1.6-0`:

- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.7`
- previous version for package: `0.1.5-0`

## ros_ethercat

- No changes

## ros_ethercat_eml

- No changes

## ros_ethercat_hardware

- No changes

## ros_ethercat_loop

- No changes

## ros_ethercat_model

- No changes