Configuring Telemetry Publisher When Key Trustee Is Enabled

When Key Trustee is enabled, the default HDFS user for Telemetry Publisher (hdfs) does not have permission to download the relevant files from HDFS. The Telemetry Publisher user must be in both of the user groups that contain the Job History Server and the Spark History Server. For example, if the Job History Server is in the hadoop user group and the Spark History Server is in the spark user group, the Telemetry Publisher user must be in both the hadoop group and the spark group to download files from HDFS when Key Trustee is enabled.