Rewrite test certificates using more modern algorithms

The test.p12 file use the RC2-CBC and 3DES-CBC algorithms, which
are quite dated and require the `-legacy` option in openssl to read
them.

```console
$ openssl pkcs12 -in test.p12 -info -noout -legacy -passin pass:test
MAC: sha1, Iteration 1
MAC length: 20, salt length: 8
PKCS7 Encrypted data: pbeWithSHA1And40BitRC2-CBC, Iteration 2048
Certificate bag
PKCS7 Data
Shrouded Keybag: pbeWithSHA1And3-KeyTripleDES-CBC, Iteration 2048
```

Rewrite the test.p12 file with a current openssl (via p12 -> pem -> p12
conversion) to use more modern algorithms which do not require legacy
mode. Rewrite test.pem with a new export of test.p12.

```console
$ openssl pkcs12 -in test.p12 -info -noout -passin pass:test
MAC: sha256, Iteration 2048
MAC length: 32, salt length: 8
PKCS7 Encrypted data: PBES2, PBKDF2, AES-256-CBC, Iteration 2048, PRF hmacWithSHA256
Certificate bag
PKCS7 Data
Shrouded Keybag: PBES2, PBKDF2, AES-256-CBC, Iteration 2048, PRF hmacWithSHA256
```

test/test.pem

@@ -1,8 +1,8 @@
 Bag Attributes
     friendlyName: Minizip
     localKeyID: 58 47 0B C9 69 23 3A 00 CD 7E 00 94 80 25 34 19 43 A8 C9 6C 
-subject=/CN=Minizip/O=Minizip/OU=MZ/ST=AZ/C=US/L=Phoenix/emailAddress=nathan@nathanm.com
-issuer=/CN=Minizip/O=Minizip/OU=MZ/ST=AZ/C=US/L=Phoenix/emailAddress=nathan@nathanm.com
+subject=CN = Minizip, O = Minizip, OU = MZ, ST = AZ, C = US, L = Phoenix, emailAddress = nathan@nathanm.com
+issuer=CN = Minizip, O = Minizip, OU = MZ, ST = AZ, C = US, L = Phoenix, emailAddress = nathan@nathanm.com
 -----BEGIN CERTIFICATE-----
 MIIDpzCCAo+gAwIBAgIBATANBgkqhkiG9w0BAQsFADCBgDEQMA4GA1UEAwwHTWlu
 aXppcDEQMA4GA1UECgwHTWluaXppcDELMAkGA1UECwwCTVoxCzAJBgNVBAgMAkFa
@@ -30,32 +30,32 @@ Bag Attributes
     localKeyID: 58 47 0B C9 69 23 3A 00 CD 7E 00 94 80 25 34 19 43 A8 C9 6C 
 Key Attributes: <No Attributes>
 -----BEGIN ENCRYPTED PRIVATE KEY-----
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-kYU=
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+bp5Sjaq/lk0VkASjl+s4cw==
 -----END ENCRYPTED PRIVATE KEY-----