rtshell_core: 3.0.2-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `rtshell_core` to `3.0.2-0`:

- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.4`
- previous version for package: `3.0.1-0`

## rtctree

```
* use 3.0.1 of rtctree, due to #34
* Contributors: Kei Okada
```

## rtshell

- No changes

## rtshell_core

- No changes

## rtsprofile

- No changes