Bump test-kitchen from 2.8.0 to 2.9.0 in /omnibus
Bump test-kitchen from 2.8.0 to 2.9.0 in /omnibus

Bumps [test-kitchen](https://github.com/test-kitchen/test-kitchen) from 2.8.0 to 2.9.0.
- [Release notes](https://github.com/test-kitchen/test-kitchen/releases)
- [Changelog](https://github.com/test-kitchen/test-kitchen/blob/master/CHANGELOG.md)
- [Commits](https://github.com/test-kitchen/test-kitchen/compare/v2.8.0...v2.9.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
nvwls/chef,mattray/chef,mattray/chef,nvwls/chef,chef/chef,gene1wood/chef,gene1wood/chef,gene1wood/chef,mwrock/chef,tas50/chef-1,MsysTechnologiesllc/chef,mwrock/chef,tas50/chef-1,MsysTechnologiesllc/chef,chef/chef,tas50/chef-1,nvwls/chef,MsysTechnologiesllc/chef,mwrock/chef,MsysTechnologiesllc/chef,nvwls/chef,nvwls/chef,nvwls/chef,tas50/chef-1,mattray/chef,chef/chef,mwrock/chef,mattray/chef,chef/chef,gene1wood/chef,mattray/chef