Try to get decryption object key from stored metadata (key_id path from
X-Object-Sysmeta-Crypto-Body-Meta) because sometime object.path is wrong
during encryption process.
This patch doesn't solve the underlying issue, but is needed to decrypt
already wrongly stored objects.
Change-Id: I1a6bcdebdb46ef03c342428aeed73ae76db29922
Co-Author: Thomas Goirand <thomas@goirand.fr>
Partial-Bug: #1813725
9b3ca9423e