tests (e2e/CLI/set_get): fix RSM request: items are stored in chronological order in Pubsub, and as we want the more recent one, we need to set `before=''`. Otherwise, we can get a wrong item from a previous test.

#!/bin/sh

eval $(dbus-launch --sh-syntax)

nohup /usr/bin/Xtigervnc -geometry 1024x768 -desktop "Libervia e2e test" -rfbport 5900 -SecurityTypes None :0 &
nohup openbox &
exec libervia-backend fg