Jenkins: better timeout when disconnected from devices (#31256)

* timeout better

* timeoutes

Jenkinsfile

@@ -12,7 +12,7 @@ def retryWithDelay(int maxRetries, int delay, Closure body) {
 def device(String ip, String step_label, String cmd) {
   withCredentials([file(credentialsId: 'id_rsa', variable: 'key_file')]) {
     def ssh_cmd = """
-ssh -tt -o StrictHostKeyChecking=no -i ${key_file} 'comma@${ip}' /usr/bin/bash <<'END'
+ssh -tt -o ConnectTimeout=30 -o ServerAliveInterval=30 -o ServerAliveCountMax=3 -o BatchMode=yes -o StrictHostKeyChecking=no -i ${key_file} 'comma@${ip}' /usr/bin/bash <<'END'
 
 set -e