fix(ssh): added missing import

rhodecode/apps/ssh_support/__init__.py

@@ -55,5 +55,6 b' def includeme(config):'
     if settings[config_keys.generate_authorized_keyfile]:
         # lazy import here for faster code reading... via sshwrapper-v2 mode
         from .subscribers import generate_ssh_authorized_keys_file_subscriber
+        from .events import SshKeyFileChangeEvent
         config.add_subscriber(
             generate_ssh_authorized_keys_file_subscriber, SshKeyFileChangeEvent)