FaceletVLD.retargetMethodExpressions should preserve EL VariableMapper and FunctionMapper

org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.retargetMethodExpressions calls facesContext.getELContext() but should use FaceletContext instead to preserve EL variable and function mapping. Consider this example:

<ui:param
name="localBean"
value="#

{very.long.path.to.a.bean.in.el}

" />
<a:niceCompositeComponent customMethod="#

{localBean.method}

" >

will not work but

customMethod="#

{very.long.path.to.a.bean.in.el.method}

will.

This can be easily fixed by using ELContext elContext = (ELContext) context.getAttributes().get(FaceletContext.FACELET_CONTEXT_KEY);

instead of facesContext.getELContext().