Revert Jenkinsfile back to AdoptOpenJDK awaiting merge

Signed-off-by: Stewart X Addison <[email protected]>

Author: sxa

Jenkinsfile

@@ -99,7 +99,7 @@ pipeline {
 def dockerBuild(version) {
     // dockerhub is the ID of the credentials stored in Jenkins
     docker.withRegistry('https://index.docker.io/v1/', 'dockerhub') {
-        git poll: false, url: 'https://github.com/sxa/openjdk-docker.git', branch: 'purge_cache'
+        git poll: false, url: 'https://github.com/AdoptOpenJDK/openjdk-docker.git'
         if (version){
             sh label: '', script: "./build_all.sh ${version}"
         } else {