Redirecting the logs of robot to a file

Change-Id: I0f60913b040df80f0a96cd88d485a2f6692ffdc5
Signed-off-by: Felipe Vicens <felipe.vicens@atos.net>
diff --git a/jenkins/ci-pipelines/ci_stage_3.groovy b/jenkins/ci-pipelines/ci_stage_3.groovy
index d518cfc..671482c 100644
--- a/jenkins/ci-pipelines/ci_stage_3.groovy
+++ b/jenkins/ci-pipelines/ci_stage_3.groovy
@@ -102,7 +102,7 @@
 }
 
 def archive_logs(stackName) {
-    sh "docker service ls |grep \"${stackName}\"| awk '{print \$2}'| xargs -iy docker service logs y --timestamps > containers_logs.txt 2>&1"
+    sh "docker service ls |grep \"${stackName}\"| awk '{print \$2}'| xargs -iy docker service logs y --timestamps &> containers_logs.txt"
     archiveArtifacts artifacts: 'containers_logs.txt'
 }