GRAILS-11748 - fix params.action for resource mappings

All of the mappings for a particular resource were sharing a Map so the action of the last one created was being shared.  Since delete was the last one created at https://github.com/grails/grails-core/blob/8c5d540797cd374c176e82aee7ca78e6dffaaf20/grails-web-url-mappings/src/main/groovy/org/codehaus/groovy/grails/web/mapping/DefaultUrlMappingEvaluator.java#L638, all of the mappings for that resource shared a params.action of "delete".