Get unique eval times for alert unit tests (#4964)
Get unique eval times for alert unit tests (#4964)

Signed-off-by: Ganesh Vernekar <cb5593e95c6f4f9d31a7d363cec8452e89af4967@iith.ac.in>
prometheus/prometheus,GoogleCloudPlatform/prometheus,kangwoo/prometheus,kangwoo/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,prometheus/prometheus,kangwoo/prometheus,GoogleCloudPlatform/prometheus,Gouthamve/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,alileza/prometheus,alileza/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,keegancsmith/prometheus,Gouthamve/prometheus,prometheus/prometheus,Gouthamve/prometheus,alileza/prometheus,kangwoo/prometheus,GoogleCloudPlatform/prometheus,prometheus/prometheus,prometheus/prometheus,alileza/prometheus