Polishing.

Extract artifactory credentials into properties file.

See #2541

Jenkinsfile

@@ -31,7 +31,7 @@ pipeline {
 			}
 			options { timeout(time: 30, unit: 'MINUTES') }
 			environment {
-				ARTIFACTORY = credentials('02bd1690-b54f-4c9f-819d-a77cb7a9822c')
+				ARTIFACTORY = credentials("${p['artifactory.credentials']}")
 			}
 			steps {
 				script {
@@ -58,7 +58,7 @@ pipeline {
 			options { timeout(time: 20, unit: 'MINUTES') }
 
 			environment {
-				ARTIFACTORY = credentials('02bd1690-b54f-4c9f-819d-a77cb7a9822c')
+				ARTIFACTORY = credentials("${p['artifactory.credentials']}")
 			}
 
 			steps {

ci/pipeline.properties

@@ -21,3 +21,4 @@ docker.java.inside.docker=-u root -v /var/run/docker.sock:/var/run/docker.sock -
 # Credentials
 docker.registry=
 docker.credentials=hub.docker.com-springbuildmaster
+artifactory.credentials=02bd1690-b54f-4c9f-819d-a77cb7a9822c