private VerifiableProperties getVProps(Properties properties) {
    setMandatoryValues(properties);
    return new VerifiableProperties(properties);
  }
Gets {@link VerifiableProperties} with some mandatory values set.
@param properties the {@link Properties} file to use to build the {@link VerifiableProperties}.
@return an instance of {@link VerifiableProperties}.
ambry-rest/src/test/java/com/github/ambry/rest/RestServerTest.java