Querier ignore 'The specified key does not exist' error #398

Job	Run time
Go build with -tags=stringlabels	41s
Go build for different platforms	9m 7s
Check misspelled words	10s
Linters (Static Analysis) for Go	3m 4s
Thanos unit tests	19m 0s
Thanos end-to-end tests (8, 0)	5m 31s
Thanos end-to-end tests (8, 1)	3m 48s
Thanos end-to-end tests (8, 2)	3m 43s
Thanos end-to-end tests (8, 3)	4m 27s
Thanos end-to-end tests (8, 4)	7m 56s
Thanos end-to-end tests (8, 5)	4m 3s
Thanos end-to-end tests (8, 6)	4m 19s
Thanos end-to-end tests (8, 7)	4m 15s
	1h 10m 4s

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