static Properties getKMSProperties(String key, int randomKeySizeInBits) {
    Properties properties = new Properties();
    properties.setProperty("kms.default.container.key", key);
    properties.setProperty("kms.random.key.size.in.bits", Integer.toString(randomKeySizeInBits));
    properties.setProperty("clustermap.cluster.name", "dev");
    properties.setProperty("clustermap.datacenter.name", "DC1");
    properties.setProperty("clustermap.host.name", "localhost");
    return properties;
  }
Constructs and returns a VerifiableProperties instance with the defaults required for instantiating
the {@link SingleKeyManagementService}.
@param key the single default key to be set
@param randomKeySizeInBits random key size in bits value
@return the created Properties instance.
ambry-router/src/test/java/com/github/ambry/router/CryptoTestUtils.java