virsh_detach_device_alias: Skip test when no input

- The Problem

Tests rhel.virsh.detach_device_alias.live.input.passthrough and
rhel.virsh.detach_device_alias.config.input.passthrough do not
pass if there is not input device, as they require a device
to passthrough to the vm

- The Solution
Skip the test if no input device can be found

Signed-off-by: Slancaster1 <[email protected]>

libvirt/tests/src/virsh_cmd/domain/virsh_detach_device_alias.py

@@ -270,7 +270,7 @@ def start_usbredirserver():
         if input_type == "passthrough":
             event = process.run("ls /dev/input/event*", shell=True, ignore_status=True).stdout
             if len(event) == 0:
-                test.error("Not found any input devices")
+                test.skip("Not found any input devices")
             input_dict.update({"source_evdev": event.decode('utf-8').split()[0]})
 
         input_obj = Input(type_name=input_type)