Bump softlayer from 6.1.8 to 6.1.9 (#1733)

Bumps [softlayer](https://github.com/softlayer/softlayer-python) from 6.1.8 to 6.1.9.
- [Release notes](https://github.com/softlayer/softlayer-python/releases)
- [Changelog](https://github.com/softlayer/softlayer-python/blob/master/CHANGELOG.md)
- [Commits](softlayer/softlayer-python@v6.1.8...v6.1.9)

---
updated-dependencies:
- dependency-name: softlayer
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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