xADDomainController: Fix Issue #155 - Get-TargetResource fails (#249)

- Added Ensure Read property to xADDomainController to fix Get-TargetResource return bug (issue #155).
  - Updated readme and add release notes

DSCResources/MSFT_xADDomainController/MSFT_xADDomainController.schema.mof

@@ -9,4 +9,5 @@ class MSFT_xADDomainController : OMI_BaseResource
     [Write, Description("The path where the Sysvol will be stored.")] String SysvolPath;
     [Write, Description("The name of the site this Domain Controller will be added to.")] String SiteName;
     [Write, Description("The path of the media you want to use install the Domain Controller.")] String InstallationMediaPath;
+    [Read, Description("The state of the Domain Controller.")] String Ensure;
 };

README.md

@@ -113,6 +113,8 @@ The xADDomain resource creates a new domain in a new forest or a child domain in
 
 ### **xADDomainController**
 
+The xADDomainController DSC resource will install and configure domain controllers in Active Directory.
+
 * **`[String]` DomainName** _(Key)_: The fully qualified domain name for the domain where the domain controller will be present.
 * **`[PSCredential]` DomainAdministratorCredential** _(Required)_: Specifies the credential for the account used to install the domain controller.
 * **`[PSCredential]` SafemodeAdministratorPassword** _(Required)_: Password for the administrator account when the computer is started in Safe Mode.
@@ -121,6 +123,7 @@ The xADDomain resource creates a new domain in a new forest or a child domain in
 * **`[String]` SysvolPath** _(Write)_: Specifies the fully qualified, non-UNC path to a directory on a fixed disk of the local computer where the Sysvol file will be written.
 * **`[String]` SiteName** _(Write)_: Specify the name of an existing site where new domain controller will be placed.
 * **`[String]` InstallationMediaPath** _(Write)_: Specify the path of the folder containg the Installation Media created in NTDSutil.
+* **`[String]` Ensure** _(Read)_: The state of the Domain Controller, returned with Get.
 
 ### **xADDomainDefaultPasswordPolicy**
 
@@ -375,6 +378,8 @@ The xADForestProperties DSC resource will manage User Principal Name (UPN) suffi
 * Changes to xADUser
   * Added TrustedForDelegation parameter to xADUser to support enabling/disabling Kerberos delegation
   * Minor clean up of unit tests.
+* Added Ensure Read property to xADDomainController to fix Get-TargetResource return bug ([issue #155](https://github.com/PowerShell/xActiveDirectory/issues/155)).
+  * Updated readme and add release notes
 
 ### 2.24.0.0