sendRedirect() of BaseHstComponent must be able to append query parameters for convenience.

>> Therefore, I'd like to suggest you add new method in BaseHstComponent
>> (in hst-client.) as follows:
>>
>> /**
>> *
>> * Facility method for sending a redirect to a SiteMapItemId.
>> *
>> * @param path the sitemap path you want to redirect to
>> * @param request the HstRequest
>> * @param response the HstResponse
>> * @param queryParams query parameters to be appended to the
>> redirection url.
>> */
>> public void sendRedirect(String path, HstRequest request,
>> HstResponse response, Map<String, String [] queryParams);
>>
>> I think this would be good enough for your case without confusing the
>> current basic assumptions.