Fix. Execute the changelog shell script without login

Change-Id: Ib8c146620a987154bc041855e5cb278a26243bcf
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/Jenkinsfile.new b/Jenkinsfile.new
index 465ab15..48293b2 100644
--- a/Jenkinsfile.new
+++ b/Jenkinsfile.new
@@ -106,7 +106,7 @@
             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'
             """
           }
         }
@@ -120,4 +120,4 @@
       deleteDir()
     }
   }
-}
\ No newline at end of file
+}