Resolve certificate references in ONC by PEM.

chromeos/test/data/network/managed_toplevel2_with_cert_fingerprints.onc

Index: chromeos/test/data/network/managed_toplevel2_with_cert_fingerprints.onc
diff --git a/chromeos/test/data/network/managed_toplevel2.onc b/chromeos/test/data/network/managed_toplevel2_with_cert_fingerprints.onc
similarity index 98%
copy from chromeos/test/data/network/managed_toplevel2.onc
copy to chromeos/test/data/network/managed_toplevel2_with_cert_fingerprints.onc
index b0826d448d49186724423179df136ac96ccb759e..13cb7b9fc7134d1fe28525fd105dae63806967f0 100644
--- a/chromeos/test/data/network/managed_toplevel2.onc
+++ b/chromeos/test/data/network/managed_toplevel2_with_cert_fingerprints.onc
@@ -55,7 +55,7 @@
           "TLSAuthContents": "-----BEGIN OpenVPN Static key V1-----\n83f8e7ccd99be189b4663e18615f9166\nd885cdea6c8accb0ebf5be304f0b8081\n5404f2a6574e029815d7a2fb65b83d0c\n676850714c6a56b23415a78e06aad6b1\n34900dd512049598382039e4816cb5ff\n1848532b71af47578c9b4a14b5bca49f\n99e0ae4dae2f4e5eadfea374aeb8fb1e\na6fdf02adc73ea778dfd43d64bf7bc75\n7779d629498f8c2fbfd32812bfdf6df7\n8cebafafef3e5496cb13202274f2768a\n1959bc53d67a70945c4c8c6f34b63327\nfb60dc84990ffec1243461e0b6310f61\ne90aee1f11fb6292d6f5fcd7cd508aab\n50d80f9963589c148cb4b933ec86128d\ned77d3fad6005b62f36369e2319f52bd\n09c6d2e52cce2362a05009dc29b6b39a\n-----END OpenVPN Static key V1-----\n",
           "TLSRemote": "my.domain.com",
           "SaveCredentials": false,
-          "ServerCARef": "{14ff4d51-64c1-4c86-a622-054dxyz}",
+          "ServerCAFingerprint": "fingerprint1",
           "Username": "${LOGIN_ID}",
           "ClientCertType": "Pattern",
           "ClientCertPattern": {