[pull] master from cortexproject:master #1375

Job	Run time
test	28m 14s
build	7m 41s
lint	8m 11s
integration-configs-db	3m 46s
integration (requires_docker)	6m 34s
integration (integration_alertmanager)	4m 40s
integration (integration_backward_compatibility)	10m 34s
integration (integration_memberlist)	8m 26s
integration (integration_querier)	16m 35s
integration (integration_ruler)	4m 50s
integration (integration_query_fuzz)	2m 42s
deploy_website	0s
deploy	0s
	1h 42m 13s

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