add sleep

Author: TCeason

tests/nox/java_client/prepare.py

@@ -2,6 +2,7 @@
 from pathlib import Path
 import requests
 from requests.auth import HTTPBasicAuth
+import time
 
 
 def main():
@@ -66,6 +67,7 @@ def create_user():
         headers={"Content-Type": "application/json"},
         json={"sql": "GRANT ROLE test_jdbc TO USER databend"},
     ).raise_for_status()
+    time.sleep(16)
     requests.post(
         "http://localhost:8001/v1/query/",
         auth=HTTPBasicAuth("root", ""),