JAXB for Authorization Server Sample

For Java 9+ compatibility

Issue: gh-5833

samples/boot/oauth2authorizationserver/spring-security-samples-boot-oauth2authorizationserver.gradle

@@ -4,6 +4,10 @@ dependencies {
 	compile 'org.springframework.boot:spring-boot-starter-web'
 	compile 'org.springframework.boot:spring-boot-starter-security'
 	compile "org.springframework.security.oauth.boot:spring-security-oauth2-autoconfigure:${springBootVersion}"
+
+	compile 'javax.xml.bind:jaxb-api'
+	compile 'com.sun.xml.bind:jaxb-core'
+	compile 'com.sun.xml.bind:jaxb-impl'
 	compile 'com.nimbusds:nimbus-jose-jwt'
 
 	testCompile 'org.springframework.boot:spring-boot-starter-test'