test: Wait longer to get address in mockserver

tests/mockserver.py

@@ -25,7 +25,7 @@ def __enter__(self, authentication=None):
             command.append("--auth=" + self.authentication)
 
         self.process = Popen(command, stdout=PIPE)
-        for _ in range(10):
+        while True:
             if address := re.search("available at (.+/)", self.process.stdout.readline().strip().decode("ascii")):
                 self.url = address.group(1)
                 break