Use legacy output when running tests to be compatible with Jenkins plugin

Change-Id: I3dabf654a6bb20e1e49793cbd4fa830ffab21b16
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/robot-systest/run_test.sh b/robot-systest/run_test.sh
index 11c3e45..ad98d88 100755
--- a/robot-systest/run_test.sh
+++ b/robot-systest/run_test.sh
@@ -234,7 +234,7 @@
 fi
 
 if [[ -n "${TEST}" ]]; then
-    robot -d ${ROBOT_DEVOPS_FOLDER}/reports --tagstatinclude "cluster_*" -i ${TEST} ${ROBOT_DEVOPS_FOLDER}/testsuite/
+    robot --legacy-output -d ${ROBOT_DEVOPS_FOLDER}/reports --tagstatinclude "cluster_*" -i ${TEST} ${ROBOT_DEVOPS_FOLDER}/testsuite/
 else
     echo "No test was provided. Exiting..."
 fi