Agent: Fix propagation success toggle in log4shell

Propagation will only be marked successful if the agent got downloaded, not if the java class got downloaded

monkey/infection_monkey/exploit/log4shell.py

@@ -159,7 +159,6 @@ class Log4ShellExploiter(WebRCE):
                         "port": port,
                     }
                     self.exploit_info["vulnerable_urls"].append(url)
-                    self.exploit_result.propagation_success = True
 
     def _wait_for_victim(self) -> bool:
         victim_called_back = self._wait_for_victim_to_download_java_bytecode()
@@ -188,6 +187,7 @@ class Log4ShellExploiter(WebRCE):
 
         while not timer.is_expired():
             if self._agent_http_server_thread.downloads > 0:
+                self.exploit_result.propagation_success = True
                 break
 
             # TODO: if the http server got an error we're waiting for nothing here