Merge pull request #3315 from quay/joseph.schorr/QUAY-1266/manifestlist-validation

Add architecture validation to manifest lists that contain schema 1 manifests

workers/tagbackfillworker.py

@@ -72,6 +72,9 @@ class BrokenManifest(ManifestInterface):
   def local_blob_digests(self):
     return []
 
+  def validate(self, content_retriever):
+    pass
+
   def child_manifests(self, lookup_manifest_fn):
     return None