T5048: QoS do not add prio if it is already in tc command

Prevent duplicatte prio fot tc command

python/vyos/qos/base.py

@@ -217,7 +217,7 @@ def update(self, config, direction, priority=None):
                 if 'match' in cls_config:
                     for index, (match, match_config) in enumerate(cls_config['match'].items(), start=1):
                         filter_cmd = filter_cmd_base
-                        if self.qostype == 'shaper':
+                        if self.qostype == 'shaper' and 'prio ' not in filter_cmd:
                             filter_cmd += f' prio {index}'
                         if 'mark' in match_config:
                             mark = match_config['mark']