A patch from Pierre Gaudin for "use requestParameters for customMethod call" https://issues.apache.org/jira/browse/OFBIZ-5822

For a content, you can set a custom method that perform an action before content's rendering.
Unfortunately, in the customMethod call, the request Parameters can't be used because they are not set into the map that is used to create custom method IN parameters.
This patch solves this problem

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1639606 13f79535-47bb-0310-9956-ffa450edef68