Don't require variant_version/_release in the API.
Don't require variant_version/_release in the API.

Signed-off-by: Nils Philippsen <ad3fa8d847df2b57853a376ad688e4be8041ecd4@redhat.com>

release-engineering/product-definition-center,product-definition-center/product-definition-center,product-definition-center/product-definition-center,release-engineering/product-definition-center,release-engineering/product-definition-center,product-definition-center/product-definition-center,release-engineering/product-definition-center,product-definition-center/product-definition-center