Update fluent-plugin-webhdfs to v0.3.1
Update fluent-plugin-webhdfs to v0.3.1

iantalarico/google-fluentd,GoogleCloudPlatform/google-fluentd,treasure-data/omnibus-td-agent,GoogleCloudPlatform/google-fluentd,treasure-data/omnibus-td-agent,iantalarico/google-fluentd,GoogleCloudPlatform/google-fluentd,iantalarico/google-fluentd,treasure-data/omnibus-td-agent