wbemprox/tests: Add initial tests for ASSOCIATORS query.

[Hans Leidekker]

On Sun, 2016-04-17 at 21:03 +0200, Sebastian Lackner wrote: 
> +static void test_associators( IWbemServices *services )
> +{
> +    static const WCHAR query1[] =
> +        {'A','S','S','O','C','I','A','T','O','R','S',' ','O','F',' ','{','W','i','n','3','2','_',
> +        'v','L','o','g','i','c','a','l','D','i','s','k','.', 'D','e','v','i','c','e','I','D','=','"','C',':','"','}',0};

Should that be 'Win32_LogicalDisk'?