Applying bf916fb5 fix to v2

v2/ansible/module_utils/powershell.ps1

@@ -142,3 +142,25 @@ Function ConvertTo-Bool
     return
 }
 
+# Helper function to calculate md5 of a file in a way which powershell 3 
+# and above can handle:
+Function Get-FileMd5($path)
+{
+    $hash = ""
+    If (Test-Path -PathType Leaf $path)
+    {
+        $sp = new-object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider;
+        $fp = [System.IO.File]::Open($path, [System.IO.Filemode]::Open, [System.IO.FileAccess]::Read);
+        [System.BitConverter]::ToString($sp.ComputeHash($fp)).Replace("-", "").ToLower();
+        $fp.Dispose();
+    }
+    ElseIf (Test-Path -PathType Container $path)
+    {
+        $hash= "3";
+    }
+    Else
+    {
+        $hash = "1";
+    }
+    return $hash
+}