Use Java 17 to build snapshots for Artifactory.

Closes #77

Jenkinsfile

@@ -67,7 +67,7 @@ pipeline {
 			steps {
 				script {
 					docker.withRegistry(p['docker.registry'], p['docker.credentials']) {
-						docker.image(p['docker.java.main.image']).inside(p['docker.java.inside.basic']) {
+						docker.image(p['docker.java.lts.image']).inside(p['docker.java.inside.basic']) {
 							sh 'MAVEN_OPTS="-Duser.name=jenkins -Duser.home=/tmp/jenkins-home" ./mvnw -Partifactory ' +
 									'-Dartifactory.server=https://repo.spring.io ' +
 									"-Dartifactory.username=${ARTIFACTORY_USR} " +

ci/pipeline.properties

@@ -2,6 +2,7 @@
 java.main.tag=8u312-b07-jdk
 java.11.tag=11.0.13_8-jdk
 java.15.tag=15.0.2_7-jdk-hotspot
+java.lts.tag=17.0.2_8-jdk
 
 # Docker container images - standard
 docker.java.main.image=harbor-repo.vmware.com/dockerhub-proxy-cache/library/eclipse-temurin:${java.main.tag}