Replace Jetty with Gretty

Issue gh-595

build.gradle

@@ -29,7 +29,6 @@ ext.JAVA_MODULE_SCRIPT = "${GRADLE_SCRIPT_DIR}/java-module.gradle"
 ext.MAVEN_DEPLOYMENT_SCRIPT = "${GRADLE_SCRIPT_DIR}/maven-deployment.gradle"
 ext.JAVA_SCRIPT = "${GRADLE_SCRIPT_DIR}/java.gradle"
 ext.RELEASE_CHECKS_SCRIPT = "${GRADLE_SCRIPT_DIR}/release-checks.gradle"
-ext.SAMPLE_WAR_GRADLE = "${GRADLE_SCRIPT_DIR}/sample-war.gradle"
 ext.SPRING_SNAPSHOT_TEST_SCRIPT = "${GRADLE_SCRIPT_DIR}/spring-snapshot-test.gradle"
 
 ext.coreModules = subprojects.findAll { p-> (!p.name.equals('spring-build-src') && !p.name.contains("test") && !p.name.contains("sample") && !p.name.contains("sandbox")) || p.name.contains("spring-ldap-test") }

gradle/sample-war.gradle

@@ -1,8 +0,0 @@
-apply from: JAVA_SCRIPT
-
-apply plugin: 'war'
-apply plugin: 'jetty'
-
-sonarqube {
-    skipProject = true
-}

samples/odm/build.gradle

@@ -1,4 +1,9 @@
-apply from: SAMPLE_WAR_GRADLE
+plugins {
+    id "org.gretty" version "2.3.1"
+    id 'war'
+}
+
+apply from: JAVA_SCRIPT
 
 dependencies {
     compile project(':spring-ldap-test'),

samples/plain/build.gradle

@@ -1,4 +1,9 @@
-apply from: SAMPLE_WAR_GRADLE
+plugins {
+    id "org.gretty" version "2.3.1"
+    id 'war'
+}
+
+apply from: JAVA_SCRIPT
 
 dependencies {
     compile project(':spring-ldap-test'),