[pull] master from cortexproject:master #1376

Job	Run time
lint	6m 17s
test	35m 8s
build	7m 2s
integration-configs-db	2m 59s
integration (requires_docker)	6m 38s
integration (integration_alertmanager)	5m 25s
integration (integration_backward_compatibility)	10m 51s
integration (integration_memberlist)	8m 49s
integration (integration_querier)	15m 25s
integration (integration_ruler)	4m 38s
integration (integration_query_fuzz)	2m 42s
deploy	0s
deploy_website	0s
	1h 45m 54s

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