rtshell_core: 3.0.1-0 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `rtshell_core` to `3.0.1-0`:

- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.4`
- previous version for package: `3.0.0-3`

## rtctree

- No changes

## rtshell

```
* Download 3.0.1 tarball
* add patch proposed in https://github.com/gbiggs/rtshell/pull/15
* add start_omninames.sh start starts omniNames for test code, use port 2010 for test
* (test-rtshell.py) check if nameserver exists
* display output when test failes
* Contributors: Isaac IY Saito, Kei Okada
```

## rtshell_core

- No changes

## rtsprofile

- No changes