tests/test_ethtool.py: skip test_get_active_devices for wg

wg is a wireguard interface and this test fails with
OSError: [Errno 95] Operation not supported

Author: gyakovlev

tests/test_ethtool.py

@@ -254,8 +254,8 @@ def test_get_interface_info_all(self):
 
     def test_get_active_devices(self):
         for devname in ethtool.get_active_devices():
-            # Skip these test on tun devices
-            if devname.startswith('tun'):
+            # Skip these test on tun and wg devices
+            if devname.startswith('tun') or devname.startswith('wg'):
                 continue
             self._functions_accepting_devnames(devname)