Set alert to fire after 15m, to match message (#4839)
Set alert to fire after 15m, to match message (#4839)

Signed-off-by: Danny Kopping <d1227f0b0eadb951ac766cb9ccee7ac68e5416a0@grafana.com>
grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki