Add NewName property to xGroup.

Author: gaelicWizard

CHANGELOG.md

@@ -36,6 +36,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Updated build to use `Sampler.GitHubTasks` - Fixes [Issue #711](https://github.com/dsccommunity/xPSDesiredStateConfiguration/issues/711).
 - Added support for publishing code coverage to `CodeCov.io` and
   Azure Pipelines - Fixes [Issue #711](https://github.com/dsccommunity/xPSDesiredStateConfiguration/issues/711).
+- Added NewName property to xGroup.
 
 ## [9.1.0] - 2020-02-19
 

README.md

@@ -247,6 +247,7 @@ None
   remove a group, set this property to Absent. The default value is Present.
   { *Present* | Absent }.
 * **[String] Description** _(Write)_: The description the group should have.
+* **[String] NewName** _(Write)_: The new name the group should have. When setting this property, the GroupName property must be set appropriately to uniquely identify the group both before and after setting the SamAccountName, e.g. by SID.
 * **[String[]] Members** _(Write)_: The members the group should have. This
   property will replace all the current group members with the specified
   members. Members should be specified as strings in the format of their domain