Fix. Execute the changelog shell script without login

Change-Id: Iefb91fe5e9b2ec64d72d4735201f6ebeb38ccc29
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/Jenkinsfile.new b/Jenkinsfile.new
index 9165023..9e37271 100644
--- a/Jenkinsfile.new
+++ b/Jenkinsfile.new
@@ -121,7 +121,7 @@
             sh """
               docker run --rm ${common} \
                 ${env.TEST_IMAGE} \
-                /bin/sh -lc 'devops/tools/generatechangelog-pipeline.sh > /tests/changelog/changelog-${MDG}.html'
+                sh -c 'devops/tools/generatechangelog-pipeline.sh > /tests/changelog/changelog-${MDG}.html'
             """
           }
         }