Fix test to error exit value when no servers connexion

src/ZEO/scripts/zeopack.py

@@ -169,6 +169,7 @@ def _main(args=None, prog=None):
     if not server_found:
         error("Cannot connect to any of the configured ZEO servers.")
 
+
 def main(*args):
     root_logger = logging.getLogger()
     old_level = root_logger.getEffectiveLevel()

src/ZEO/scripts/zeopack.test

@@ -202,6 +202,9 @@ seconds of waiting for a connect.
     sleep(1)
     Couldn't connect to: (('host1', 8100), '2')
     close()
+    Error:
+    Cannot connect to any of the configured ZEO servers.
+    Exited 1
 
     >>> ClientStorage.connect_wait = 0