* Fixed a bug in the performance counter query when run against SQL Server 2016 SP1-CU2. The performance counter DMV contains duplicate entries which are not handled by the query.

* Adding more stats related to workload groups.

* Adding new RG stats, removing "host" tag

* Removed workload group query

* Fixing some 2008 compat issues, removed the host field from the result set.

* Adding fixes for SQL Server 2008 compat around RG columns. Also converted perf counter query to support named instances.