test.ListCmd: Fix option match logic

Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/devtest/os/test/ListCmd.py

@@ -56,7 +56,7 @@ class ListCmd(TestCase): # export
                     if type(val) != list:
                         raise Exception('Found attribute {}="{}" of unexpected value type {}'.format(key, val, type(val)))
                     if feature in val: # first match
-                        return True
+                        return key == key_
             return False
 
         def check_attrib(self, key, features):