Empty assemblies

`downstream/assemblies/terraform-aap/assembly-terraform-product.adoc` and `downstream/assemblies/vault-aap/assembly-vault-product.adoc` continue to throw an "AsciiDocDITA.ShortDescription:Assign [role="_abstract"] to a paragraph to use it as in DITA." error because they are empty except for a title. Neither have any text to add [role="_abstract"] to, nor any include statements.

Open downstream/assemblies/terraform-aap/assembly-terraform-product.adoc and downstream/assemblies/vault-aap/assembly-vault-product.adoc, then run the documentation validation that reports the AsciiDocDITA.ShortDescription error. Determine the appropriate resolution for these title-only assemblies; done means both files pass validation without the error.

Written by the indexing model from the issue text.