Fix safe get safety condition

Author: Quentin Lemaire

config/kube_config.py

@@ -493,7 +493,7 @@ def __len__(self):
         return len(self.value)
 
     def safe_get(self, key):
-        if (isinstance(self.value, list) and isinstance(key, int) or
+        if (isinstance(self.value, list) and isinstance(key, int) and
                 key in self.value):
             return self.value[key]