Replace usages of getParameterTypes().length with getParameterCount() (Clustering)

wildfly-clustering-jgroups-extension  (1 usage found)
            clustering/jgroups/extension/src/main/java/org/jboss/as/clustering/jgroups/subsystem  (1 usage found)
                ProtocolMetricsHandler.java  (1 usage found)
                    findProtocolAttributes(Class<? extends Protocol>)  (1 usage found)
                        285 if ((method.getParameterTypes().length == 0) && isManagedAttribute(method)) {