The current implementation actually fails unit test because it tries to
use alarm id as the internal MongoDB object ID. That doesn't work
because MongoDB object ID must have a certain format and length.
Rather than using a backend specific alarm id, let's just use an uuid
based one that is not tight to the back-end.
Change-Id: I9ea79fc56b8beaf1efceddeaa5e9e43b620e5e98
Signed-off-by: Julien Danjou <julien@danjou.info>
0fdf53d675