Jenkinsfile use jdk8

Jenkins does not have openjdk8 defined

Jenkinsfile

@@ -15,7 +15,7 @@ try {
 				checkout scm
 				sh "git clean -dfx"
 				try {
-					withEnv(["JAVA_HOME=${ tool 'openjdk8' }"]) {
+					withEnv(["JAVA_HOME=${ tool 'jdk8' }"]) {
 						sh "./gradlew clean check  --refresh-dependencies --no-daemon --stacktrace"
 					}
 				} catch(Exception e) {
@@ -34,7 +34,7 @@ try {
 				sh "git clean -dfx"
 				withCredentials([string(credentialsId: 'spring-sonar.login', variable: 'SONAR_LOGIN')]) {
 					try {
-						withEnv(["JAVA_HOME=${ tool 'openjdk8' }"]) {
+						withEnv(["JAVA_HOME=${ tool 'jdk8' }"]) {
 							if ("master" == env.BRANCH_NAME) {
 								sh "./gradlew sonarqube -PexcludeProjects='**/samples/**' -Dsonar.host.url=$SPRING_SONAR_HOST_URL -Dsonar.login=$SONAR_LOGIN --refresh-dependencies --no-daemon --stacktrace"
 							} else {
@@ -55,7 +55,7 @@ try {
 				checkout scm
 				sh "git clean -dfx"
 				try {
-					withEnv(["JAVA_HOME=${ tool 'openjdk8' }"]) {
+					withEnv(["JAVA_HOME=${ tool 'jdk8' }"]) {
 						sh "./gradlew clean test -PforceMavenRepositories=snapshot -PspringVersion='5.+' -PreactorVersion=Dysprosium-BUILD-SNAPSHOT -PspringDataVersion=Lovelace-BUILD-SNAPSHOT --refresh-dependencies --no-daemon --stacktrace"
 					}
 				} catch(Exception e) {
@@ -140,7 +140,7 @@ try {
 						withCredentials([string(credentialsId: 'spring-gpg-passphrase', variable: 'SIGNING_PASSWORD')]) {
 							withCredentials([usernamePassword(credentialsId: 'oss-token', passwordVariable: 'OSSRH_PASSWORD', usernameVariable: 'OSSRH_USERNAME')]) {
 								withCredentials([usernamePassword(credentialsId: '02bd1690-b54f-4c9f-819d-a77cb7a9822c', usernameVariable: 'ARTIFACTORY_USERNAME', passwordVariable: 'ARTIFACTORY_PASSWORD')]) {
-									withEnv(["JAVA_HOME=${ tool 'openjdk8' }"]) {
+									withEnv(["JAVA_HOME=${ tool 'jdk8' }"]) {
 										sh "./gradlew deployArtifacts finalizeDeployArtifacts -Psigning.secretKeyRingFile=$SIGNING_KEYRING_FILE -Psigning.keyId=$SPRING_SIGNING_KEYID -Psigning.password='$SIGNING_PASSWORD' -PossrhUsername=$OSSRH_USERNAME -PossrhPassword=$OSSRH_PASSWORD -PartifactoryUsername=$ARTIFACTORY_USERNAME -PartifactoryPassword=$ARTIFACTORY_PASSWORD --refresh-dependencies --no-daemon --stacktrace"
 									}
 								}
@@ -156,7 +156,7 @@ try {
 					checkout scm
 					sh "git clean -dfx"
 					withCredentials([file(credentialsId: 'docs.spring.io-jenkins_private_ssh_key', variable: 'DEPLOY_SSH_KEY')]) {
-						withEnv(["JAVA_HOME=${ tool 'openjdk8' }"]) {
+						withEnv(["JAVA_HOME=${ tool 'jdk8' }"]) {
 							sh "./gradlew deployDocs -PdeployDocsSshKeyPath=$DEPLOY_SSH_KEY -PdeployDocsSshUsername=$SPRING_DOCS_USERNAME --refresh-dependencies --no-daemon --stacktrace"
 						}
 					}
@@ -169,7 +169,7 @@ try {
 					checkout scm
 					sh "git clean -dfx"
 					withCredentials([file(credentialsId: 'docs.spring.io-jenkins_private_ssh_key', variable: 'DEPLOY_SSH_KEY')]) {
-						withEnv(["JAVA_HOME=${ tool 'openjdk8' }"]) {
+						withEnv(["JAVA_HOME=${ tool 'jdk8' }"]) {
 							sh "./gradlew deploySchema -PdeployDocsSshKeyPath=$DEPLOY_SSH_KEY -PdeployDocsSshUsername=$SPRING_DOCS_USERNAME --refresh-dependencies --no-daemon --stacktrace"
 						}
 					}