Upgrade the Grails sample to Grails 3.3.x and Gradle 4.9

Closes gh-540

samples/rest-notes-grails/build.gradle

@@ -1,5 +1,6 @@
 buildscript {
 	repositories {
+		mavenCentral()
 		maven { url "https://repo.grails.org/grails/core" }
 	}
 	dependencies {
@@ -58,7 +59,7 @@ dependencies {
 	compile "org.grails:grails-plugin-services"
 	compile "org.grails:grails-plugin-datasource"
 	compile "org.grails:grails-plugin-databinding"
-	compile "org.grails:grails-plugin-async"
+	compile "org.grails.plugins:async"
 	compile "org.grails:grails-web-boot"
 	compile "org.grails:grails-logging"
 	compile "org.grails.plugins:cache"
@@ -72,9 +73,10 @@ dependencies {
 	profile "org.grails.profiles:rest-api"
 
 	runtime "com.h2database:h2"
+	runtime 'org.apache.tomcat:tomcat-jdbc'
 
 	testCompile "io.rest-assured:rest-assured:3.0.2"
-	testCompile "org.grails:grails-plugin-testing"
+	testCompile "org.grails:grails-test-mixins:3.3.0"
 	testCompile "org.grails.plugins:geb"
 	testCompile "org.grails:grails-datastore-rest-client"
 	testCompile "org.springframework.restdocs:spring-restdocs-restassured"

samples/rest-notes-grails/gradle.properties

@@ -1,2 +1,2 @@
-grailsVersion=3.2.6
-gradleWrapperVersion=3.4
+grailsVersion=3.3.2
+gradleWrapperVersion=4.4

samples/rest-notes-grails/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,5 @@
-#Thu Mar 23 11:49:00 GMT 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.9-bin.zip

samples/rest-notes-grails/gradlew

@@ -33,11 +33,11 @@ DEFAULT_JVM_OPTS=""
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
 
-warn ( ) {
+warn () {
     echo "$*"
 }
 
-die ( ) {
+die () {
     echo
     echo "$*"
     echo
@@ -155,7 +155,7 @@ if $cygwin ; then
 fi
 
 # Escape application args
-save ( ) {
+save () {
     for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
     echo " "
 }

samples/rest-notes-grails/grails-app/controllers/com/example/UrlMappings.groovy

@@ -19,12 +19,7 @@ package com.example
 class UrlMappings {
 
 	static mappings = {
-		delete "/$controller/$id(.$format)?"(action:"delete")
-		get "/$controller(.$format)?"(action:"index")
-		get "/$controller/$id(.$format)?"(action:"show")
-		post "/$controller(.$format)?"(action:"save")
-		put "/$controller/$id(.$format)?"(action:"update")
-		patch "/$controller/$id(.$format)?"(action:"patch")
+		'/notes'(resources: 'note')
 
 		"500"(view: '/error')
 		"404"(view: '/notFound')

samples/rest-notes-grails/grails-app/domain/com/example/Note.groovy

@@ -18,7 +18,7 @@ package com.example
 
 import grails.rest.Resource
 
-@Resource(uri='/notes', formats = ['json', 'xml'])
+@Resource(uri='/notes')
 class Note {
 
 	Long id

samples/rest-notes-grails/grails-app/domain/com/example/Tag.groovy

@@ -18,7 +18,7 @@ package com.example
 
 import grails.rest.Resource
 
-@Resource(uri='/tags', formats = ['json', 'xml'])
+@Resource(uri='/tags')
 class Tag {
 
 	Long id