Upgrade to fluent-plugin-kubernetes_metadata_filter 2.4.2. (#235)
Upgrade to fluent-plugin-kubernetes_metadata_filter 2.4.2. (#235)

Fixes https://github.com/fabric8io/fluent-plugin-kubernetes_metadata_filter/issues/194.
GoogleCloudPlatform/google-fluentd,GoogleCloudPlatform/google-fluentd,GoogleCloudPlatform/google-fluentd