Update xml:helloworld sample to use Spring 6

Issue gh-46

servlet/xml/java/helloworld/build.gradle

@@ -1,7 +1,7 @@
 plugins {
 	id "java"
 	id "nebula.integtest" version "8.2.0"
-	id "org.gretty" version "3.0.6"
+	id "org.gretty" version "4.0.0"
 	id "war"
 }
 
@@ -13,16 +13,17 @@ repositories {
 }
 
 dependencies {
-	implementation platform("org.springframework.security:spring-security-bom:5.6.0-SNAPSHOT")
+	implementation platform("org.springframework.security:spring-security-bom:6.0.0-SNAPSHOT")
 	implementation platform("org.junit:junit-bom:5.7.0")
 
 	implementation "org.springframework.security:spring-security-config"
 	implementation "org.springframework.security:spring-security-web"
-	implementation "org.thymeleaf:thymeleaf-spring5:3.0.11.RELEASE"
-	implementation 'javax.servlet:jstl:1.2'
 	implementation 'org.slf4j:slf4j-api:1.7.30'
 	implementation 'org.slf4j:slf4j-simple:1.7.30'
 
+	providedCompile "jakarta.servlet:jakarta.servlet-api:5.0.0"
+	providedCompile "org.glassfish.web:jakarta.servlet.jsp.jstl:2.0.0"
+
 	testImplementation "org.springframework:spring-test"
 	testImplementation "org.springframework.security:spring-security-test"
 	testImplementation("org.junit.jupiter:junit-jupiter-api")

servlet/xml/java/helloworld/gradle/gretty.gradle

@@ -1,5 +1,5 @@
 gretty {
-	servletContainer = "tomcat9"
+	servletContainer = "tomcat10"
 	contextPath = "/"
 	fileLogEnabled = false
 	integrationTestTask = 'integrationTest'