Improved build performance

Signed-off-by: Mikaël Barbero <mikael.barbero@eclipse-foundation.org>

Jenkinsfile

@@ -14,6 +14,15 @@ pipeline {
           command:
           - cat
           tty: true
+          resources:
+            limits:
+              cpu: 1
+              memory: 1Gi
+        - name: jnlp
+          resources:
+            limits:
+              cpu: 1
+              memory: 1Gi
       '''
     }
   }