message: Fix broken test key value.
diff: @@ -187,7 +187,7 @@ public final class TestingServicesTest {
  + " \"keyData\": {"
  + " \"typeUrl\": \"type.googleapis.com/google.crypto.tink.AesGcmKey\","
  + " \"keyMaterialType\": \"SYMMETRIC\","
  - + " \"value\": \"AFakeTestKeyValue1234567\""
  + + " \"value\": \"GhCC74uJ+2f4qlpaHwR4ylNQ\""
  + " },"
  + " \"outputPrefixType\": \"TINK\","
  + " \"keyId\": 42,"
  