private static boolean testAllInterfaces(int port) {
    Keeper k = keepAllInterfaces(port);
    if (k != null) {
      k.release();
      return true;
    } else {
      return false;
    }
  }
Test to see if a given port is available port on all interfaces on this host.

@return true of if the port is free on all interfaces
geode-membership/src/main/java/org/apache/geode/internal/membership/utils/AvailablePort.java