saschagrunert: Do not error log CRI stats for not cached partitions

JobBuild
b276b0d9
05-17 11:42
100448
05-17 11:40
unknown
05-17 11:39
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pull-kubernetes-e2e-kind-ipv6 1526556017305849856 1526546543685931008 1526527705724489728
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pull-kubernetes-typecheck 1526527705888067584
pull-kubernetes-unit 1526527705783209984
pull-kubernetes-verify 1526527707259604992
pull-kubernetes-verify-govet-levee 1526527706408161280