As a user I need to know if my exports are incremental or not without checking the metadata.

Suggested workflow¶

API

• Update https://github.com/Katello/katello/blob/master/app/views/katello/api/v2/content_view_version_export_histories/show.json.rabl#L3 to include a 'type' attribute that says "Complete"/"Incremental" by looking to see if the metadata has a "from_content_view_version"
• Add a "type" column to the export histories database (will need a migration to port existing histories)
• And when the history record is created we save "Complete"/"Incremental"

Hammer

• Have `hammer content-export list` show the type column.
• add a `--export_type` parameter filter