[Platform API] Export history list should include HXL tags for HXL exports

[rowasc]

TODO:

When the client requests the export history

Test script:

• [ ] Open the csv export screen (/settings/data-export)
• [ ] Click on the "History" tab
• [ ] You should only see exports that have not expired.
• [ ] Pending exports should not have an expiration date
• [ ] The export jobs have a Job ID, a created date, a status, and a user-friendly expiration date
• [ ] Each HXL Export has the HXL tags assigned by the user in it
• [ ] The export jobs should be sorted in reverse chronological order

Test script 2: request export

• [ ] Open the csv export screen (/settings/data-export)
• [ ] Click on the "History" tab
• [ ] You should only see exports that have not expired.
• [ ] Click on the "Export tab" and request an HXL Export
• [ ] Click on the history tab
• [ ] You should see all exports that you saw in step 3 (all non-expired exports) + the export job you requested
• [ ] Each HXL Export has the HXL tags assigned by the user in it
• [ ] Wait until the export job finishes (around ~5 minutes)
• [ ] Check the history tab. You should see the new export change its status to "Finished"
• [ ] The new HXL Export has the HXL tags assigned by the user in it

Modifications:

• [ ] Add hxl_tags to the /exports/jobs result
• [ ] hxl_tags field format

        {
          "tag_id": 0,
          "tag_name": "string",
          "tag_description": "string",
          "hxl_attributes": [
            {
              "description": "string",
              "name": "string",
              "id": 0
            }
          ]
        }

Aha! Link: https://ushahiditeam.aha.io/features/PROD-350

[rowasc]

@kinstelli @willdoran Can you review?

[willdoran]

@rowasc Approved, spec cover behaviour

[rowasc]

@jrtricafort this might be something we could do in cycle 7 instead of 6 to lower the workload, I'm not sure if that's possible but throwing it in here.

[jrtricafort]

@rowasc We actually may be able to descope this entirely. I'll include in our discussion w Shadrock.