[iOS 10] QNetworkConfigurationManager::isOnline returns true even when airplane mode enabled

Steps to reproduce:
1. Set airplane mode on the iOS 10 device
2. Run attached test app

Expected: QNetworkConfigurationManager::isOnline() returns false
Actual: QNetworkConfigurationManager::isOnline() returns true

On iOS 9.x devices, QNetworkConfigurationManager::isOnline() returns false when the device is in airplane mode.