Update Vault tests to make sure AES decryption works
Update Vault tests to make sure AES decryption works

Note that this test was broken in devel because it was really just
duplicating the AES256 test because setting v.cipher_name to 'AES'
no longer selected AES after it was de-write-whitelisted.

Now that we've removed the VaultAES encryption code, we embed static
output from an earlier version and test that we can decrypt it.

thaim/ansible,thaim/ansible