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.

test/units/parsing/vault/test_vault.py

@@ -104,9 +104,10 @@ class TestVaultLib(unittest.TestCase):
             raise SkipTest
         v = VaultLib('ansible')
         v.cipher_name = u'AES'
-        enc_data = v.encrypt("foobar")
+        # AES encryption code has been removed, so this is old output for
+        # AES-encrypted 'foobar' with password 'ansible'.
+        enc_data = '$ANSIBLE_VAULT;1.1;AES\n53616c7465645f5fc107ce1ef4d7b455e038a13b053225776458052f8f8f332d554809d3f150bfa3\nfe3db930508b65e0ff5947e4386b79af8ab094017629590ef6ba486814cf70f8e4ab0ed0c7d2587e\n786a5a15efeb787e1958cbdd480d076c\n'
         dec_data = v.decrypt(enc_data)
-        assert enc_data != "foobar", "encryption failed"
         assert dec_data == "foobar", "decryption failed"
 
     def test_encrypt_decrypt_aes256(self):