[pull] master from cortexproject:master #1425

Job	Run time
build	3m 41s
test	17m 50s
lint	15m 48s
integration-configs-db	1m 46s
integration (requires_docker)	5m 14s
integration (integration_alertmanager)	4m 6s
integration (integration_backward_compatibility)	11m 43s
integration (integration_memberlist)	7m 23s
integration (integration_querier)	13m 6s
integration (integration_ruler)	3m 41s
integration (integration_query_fuzz)	2m 2s
deploy_website	0s
deploy	0s
	1h 26m 20s

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