Don't allocate pty for docker exec

Author: pavel-shirshov

scripts/fast-reboot

@@ -106,7 +106,7 @@ if [[ "$REBOOT_TYPE" = "warm-reboot" ]]; then
     # Send USR1 signal to all teamd instances to stop them
     # It will prepare teamd for warm-reboot
     # Note: We must send USR1 signal before syncd, because it will send the last packet through CPU port
-    docker exec -ti teamd pkill -USR1 teamd > /dev/null
+    docker exec -i teamd pkill -USR1 teamd > /dev/null
 fi
 
 if [[ "$REBOOT_TYPE" = "fast-reboot" ]]; then