ci(kitchen+travis): adjust matrix to add 3000.1 & remove 2017.7

[myii]

• Automated using feat(vault): adjust matrix to add 3000.1 & remove 2017.7 myii/ssf-formula#154

[dafyddj]

My local testing has exposed some issues on a few platforms, but I don't believe they have been introduced specifically by this PR, so on that basis I approve, and intend to fix the issues below separately.

>>>>>> ------Exception-------
>>>>>> Class: Kitchen::ActionFailed
>>>>>> Message: 3 actions failed.
>>>>>>     Converge failed on instance <prod-server-ubuntu-1604-2019-2-py3>.  Please see .kitchen/logs/prod-server-ubuntu-1604-2019-2-py3.log for more details
>>>>>>     Converge failed on instance <prod-server-ubuntu-1604-2018-3-py2>.  Please see .kitchen/logs/prod-server-ubuntu-1604-2018-3-py2.log for more details
>>>>>>     Verify failed on instance <prod-server-centos-6-2018-3-py2>.  Please see .kitchen/logs/prod-server-centos-6-2018-3-py2.log for more details
>>>>>> ----------------------
>>>>>> Please see .kitchen/logs/kitchen.log for more details
>>>>>> Also try running `kitchen diagnose --all` for configuration

[myii]

@dafyddj Thanks for the PR, even if you "used" my account to send it through!

[saltstack-formulas-travis]

🎉 This PR is included in version 1.2.4 🎉

The release is available on GitHub release

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