Add scripts for creating cluster groups and affinity rules.

These scripts create DRS groups for virtual machines and hosts, and host
affinity rules.

Scripts/New-ClusterHostGroup.ps1

@@ -0,0 +1,43 @@
+<#	
+    .NOTES
+    ===========================================================================
+     Script name: New-ClusterHostGroup.ps1
+     Created on: 2016-10-25
+     Author: Peter D. Jorgensen (@pjorg, pjorg.com)
+     Dependencies: None known
+     ===Tested Against Environment====
+     vSphere Version: 5.5, 6.0
+     PowerCLI Version: PowerCLI 6.5R1
+     PowerShell Version: 5.0
+     OS Version: Windows 10, Windows 7
+    ===========================================================================
+	.DESCRIPTION
+		Creates a DRS Host Group in a vSphere cluster.
+    .Example
+    $ProdCluster = Get-Cluster *prod*
+	$OddHosts = $ProdCluster | Get-VMHost | ?{ $_.Name -match 'esxi-\d*[13579]+.\lab\.local' }
+    .\New-ClusterHostGroup.ps1 -Name 'OddProdHosts' -Cluster $ProdCluster -VMHost $OddHosts
+#>
+[CmdletBinding()]
+Param(
+	[Parameter(Mandatory=$True,Position=1)]
+		[String]$Name,
+	[Parameter(Mandatory=$True,ValueFromPipeline=$True,Position=2)]
+		[VMware.VimAutomation.ViCore.Types.V1.Inventory.Cluster]$Cluster,
+	[Parameter(Mandatory=$False,Position=3)]
+		[VMware.VimAutomation.ViCore.Types.V1.Inventory.VMHost[]]$VMHost
+)
+
+$NewGroup = New-Object VMware.Vim.ClusterHostGroup -Property @{
+    'Name'=$Name
+    'Host'=$VMHost.Id
+}
+
+$spec = New-Object VMware.Vim.ClusterConfigSpecEx -Property @{
+    'GroupSpec'=(New-Object VMware.Vim.ClusterGroupSpec -Property @{
+        'Info'=$NewGroup
+    })
+}
+
+$ClusterToReconfig = Get-View -VIObject $Cluster -Property Name
+$ClusterToReconfig.ReconfigureComputeResource($spec, $true)