[skip e2e]Add retry when getting image tag from dockerhub (#27107)

Signed-off-by: zhuwenxing <wenxing.zhu@zilliz.com>

tests/python_client/requirements.txt

@@ -44,6 +44,7 @@ loguru==0.7.0
 # util
 psutil==5.9.4
 pandas==1.5.3
+tenacity==8.1.0
 # for standby test
 etcd-sdk-python==0.0.2
 

tests/scripts/get_image_tag_by_short_name.py

@@ -1,6 +1,8 @@
 import requests
 import argparse
+from tenacity import retry, stop_after_attempt
 
+@retry(stop=stop_after_attempt(7))
 def get_image_tag_by_short_name(repository, tag):
 
     # Send API request to get all tags start with prefix