Usage: Reset merged info when updating (#10126)
Usage: Reset merged info when updating (#10126)

When merging multiple buckets reset between each update.

Avoids merging the same usage metrics multiple times resulting 
in duplicate data entries.
NitishT/minio,NitishT/minio,minio/minio,NitishT/minio,minio/minio,donatello/minio,donatello/minio,krisis/minio,krisis/minio,vadmeste/minio,vadmeste/minio,NitishT/minio,balamurugana/minio,balamurugana/minio