Remove Docker Registry login.

Closes #4056.

Jenkinsfile

@@ -94,7 +94,6 @@ pipeline {
 			}
 			steps {
 				script {
-					docker.withRegistry(p['docker.registry'], p['docker.credentials']) {
 					docker.image("harbor-repo.vmware.com/dockerhub-proxy-cache/springci/spring-data-with-mongodb-4.0:${p['java.main.tag']}").inside(p['docker.java.inside.basic']) {
 						sh 'mkdir -p /tmp/mongodb/db /tmp/mongodb/log'
 						sh 'mongod --setParameter transactionLifetimeLimitSeconds=90 --setParameter maxTransactionLockRequestTimeoutMillis=10000 --dbpath /tmp/mongodb/db --replSet rs0 --fork --logpath /tmp/mongodb/log/mongod.log &'
@@ -106,7 +105,6 @@ pipeline {
 				}
 			}
 		}
-		}
 
 		stage("Test other configurations") {
 			when {
@@ -126,7 +124,6 @@ pipeline {
 					}
 					steps {
 						script {
-							docker.withRegistry(p['docker.registry'], p['docker.credentials']) {
 							docker.image("harbor-repo.vmware.com/dockerhub-proxy-cache/springci/spring-data-with-mongodb-4.4:${p['java.main.tag']}").inside(p['docker.java.inside.basic']) {
 								sh 'mkdir -p /tmp/mongodb/db /tmp/mongodb/log'
 								sh 'mongod --setParameter transactionLifetimeLimitSeconds=90 --setParameter maxTransactionLockRequestTimeoutMillis=10000 --dbpath /tmp/mongodb/db --replSet rs0 --fork --logpath /tmp/mongodb/log/mongod.log &'
@@ -138,7 +135,6 @@ pipeline {
 						}
 					}
 				}
-				}
 
 				stage("test: baseline (LTS)") {
 					agent {
@@ -150,7 +146,6 @@ pipeline {
 					}
 					steps {
 						script {
-							docker.withRegistry(p['docker.registry'], p['docker.credentials']) {
 							docker.image("harbor-repo.vmware.com/dockerhub-proxy-cache/springci/spring-data-with-mongodb-4.4:${p['java.lts.tag']}").inside(p['docker.java.inside.basic']) {
 								sh 'mkdir -p /tmp/mongodb/db /tmp/mongodb/log'
 								sh 'mongod --setParameter transactionLifetimeLimitSeconds=90 --setParameter maxTransactionLockRequestTimeoutMillis=10000 --dbpath /tmp/mongodb/db --replSet rs0 --fork --logpath /tmp/mongodb/log/mongod.log &'
@@ -164,7 +159,6 @@ pipeline {
 				}
 			}
 		}
-		}
 
 		stage('Release to artifactory') {
 			when {
@@ -184,7 +178,6 @@ pipeline {
 
 			steps {
 				script {
-					docker.withRegistry(p['docker.registry'], p['docker.credentials']) {
 					docker.image(p['docker.java.main.image']).inside(p['docker.java.inside.basic']) {
 						sh 'MAVEN_OPTS="-Duser.name=jenkins -Duser.home=/tmp/jenkins-home" ./mvnw -s settings.xml -Pci,artifactory ' +
 								'-Dartifactory.server=https://repo.spring.io ' +
@@ -199,7 +192,6 @@ pipeline {
 			}
 		}
 	}
-	}
 
 	post {
 		changed {