GRAILS-6618 - upon further discussion of the issue with Graeme, we decided that forwarding parameters is actually the right thing to do. we should not be removing params before issuing a redirect.

Author: Jeff Brown

src/java/org/codehaus/groovy/grails/web/metaclass/ForwardMethod.groovy

@@ -47,7 +47,6 @@ class ForwardMethod {
         def urlInfo = new ForwardUrlMappingInfo()
 
         GrailsWebRequest webRequest = GrailsWebRequest.lookup(request)
-		webRequest.parameterMap?.clear()
 
         if (params.controller) {
             webRequest?.controllerName = params.controller