Added redacted manifest to testBackupValidate().

The manifest is excellent for validation but including the entire manifest is too noisy and some values are architecture/algorithm dependent.

Output a redacted version that contains the most important information which can be improved on over time.

test/define.yaml

@@ -564,6 +564,7 @@ unit:
           command/backup/protocol: full
 
         include:
+          - info/info
           - info/manifest
           - storage/storage