Add data export engine

[jesusbv]

Description

Add new engine data export

Add tests for data export engine actions

• Related Issue / Ticket / Trello card: https://trello.com/c/n8vD9v1b

How to test

Run the tests should all pass

Change Type

Please select the correct option.

• Bug Fix (a non-breaking change which fixes an issue)
• 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 reviewed my own code and believe that it's ready for an external review.
• I have provided comments for any hard-to-understand code.
• I have documented the MANUAL.md file with any changes to the user experience.
• If my changes are non-trivial, I have added a changelog entry to notify users at package/obs/rmt-server.changes.

Review

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and get in touch with the author to get a shared understanding of the change.

[jesusbv]

Keep in mind that this engines needs changes in ZypperAuth code, so waiting for #1270 to be merged to update this

It can be reviewed in the meantime

[rjschwei]

Approve after #1274 is merged. The usage instructions provided may not be correct, please double check.