Add fixture old manifest digest incorrect

[pwinckles]

Fixture for an incorrect manifest digest in a non-root inventory

[zimeon]

My code reports only E092:

ocfl-validate.py 1.0/bad-objects/E066_E092_old_manifest_digest_incorrect/
[E092a] OCFL Object v1 inventory manifest has digest 17e41ccb166d21a5327d5a2ae1bb48192b8470e1357266c9d119c294cb1e95978569472c9de64fb6d93cbd4dd0aed0bf1e7c47fd1920de17b038a08a85eb4fa1 for file v1/content/file-1.txt which doesn't match calculated digest 07e41ccb166d21a5327d5a2ae1bb48192b8470e1357266c9d119c294cb1e95978569472c9de64fb6d93cbd4dd0aed0bf1e7c47fd1920de17b038a08a85eb4fa1 for that file (see https://ocfl.io/1.0/spec/#E092)
INFO:ocfl.object:OCFL object at 1.0/bad-objects/E066_E092_old_manifest_digest_incorrect/ is INVALID

[zimeon]

It does seem reasonable that E066 should be reported as well as E092 because, quite separate from any test of the files in the filesystem, the state of v1 is inconsistent between the v1 and v2 inventories