PSDesiredStateConfiguration.psm1 has call to `sort` which is a native linux command and not an alias

In PSDSC.psm1 (from nuget package 1.0.0-alpha01), on line 1873, there is a call to `sort` which should be `sort-object`. `sort` is not an alias on unix, it's a coreutil command.

``` powershell
$moduleInfos = Get-Module -ListAvailable -FullyQualifiedName $moduleToImport | sort -Property Version -Descending
```

Not sure how it manages to work as is.
@johnkord @nitinbps 
