rmt-client-setup-res now should support RES7-LTSS and OL7-LTSS clients

[zpetrova]

Description

Please describe your change and provide as much context as possible. This change enable RES7-LTSS and OL7-LTSS clients to connect to rmt

Fixes # (issue) None it is new feature.

Change Type

Please select the correct option.

• [ ] Bug Fix (a non-breaking change which fixes an issue)
• [ x ] New Feature (a non-breaking change which adds new functionality)
• [ ] Documentation Update (a change which only updates documentation)

Checklist

Please check off each item if the requirement is met.

• [ ] I have verified that my code follows RMT's coding standards with rubocop.
• [ x] I have reviewed my own code and believe that it's ready for an external review.
• [ x] I have provided comments for any hard-to-understand code.
• [ ] I have documented the MANUAL.md file with any changes to the user experience.
• [ x] RMT's test coverage remains at 100%.
• [ x] If my changes are non-trivial, I have added a changelog entry to notify users at package/obs/rmt-server.changes.

Other Notes

Please use this space to provide notes or thoughts to the team, such as tips on how to review/demo your changes.

[plorinc]

Automated testing can be found here: http://deliverance.suse.cz:8080/view/sll-test/ Manual testing instructions: https://documentation.suse.com/liberty/7/html/lite-quickstart/art-lite-quickstart.html

However, the Liberty Team takes responsibility for the correctness of the script.