Support of spring InetUtils in DefaultApplicationFactory

To be able to select one of the "preferred" network interface which InetAddress doesn't allow.

Add the support of spring InetUtils to levrage the
"spring.cloud.inetutils.[...]" configurations in DefaultApplicationFactory.getLocalHost()

private final Optional<org.springframework.cloud.commons.util.InetUtils> inetUtils

protected InetAddress getLocalHost() {
  try {
    inetUtils.map(InetUtils::findFirstNonLoopbackAddress).orElse(InetAddress.getLocalHost());
    }
    catch (final UnknownHostException ex) {
      throw new IllegalArgumentException(ex.getMessage(), ex);
    }
}

Start at DefaultApplicationFactory.getLocalHost() and review how the current InetAddress lookup is performed. Check how spring-cloud InetUtils can be integrated to honor the spring.cloud.inetutils configurations while retaining the existing fallback and UnknownHostException handling. Done means preferred network interfaces are selected through InetUtils when available.