The service afm-user-setup is invoked each time an app is started.
If the user starts apps too quickly (3 apps in less than 10secs by default),
then afm-user-setup will fail and the last app is not started.
This patch removes the rate limitation coming from systemd default config.
Change-Id: Ief6af726c58866e2fc6d3fa170e5f6c6afbee987
Signed-off-by: Stephane Desneux <stephane.desneux@iot.bzh>