Overrides the "metadata/entityName" value for Cloudera Manager clusters.
The HDFS Capacity Forecasting report matches this value when querying the capacity_used metric from the timeseries REST endpoint.
The value should be equivalent to the desired HDFS nameservice name from the hdfs-site config "dfs.nameservices"
Example: HDFS, hdfsdevns1
If not specified and there is only one instance of HDFS, it will report on that instance. If not specified and there are multiple instances of HDFS, the report fails.