Stop overwriting demo.sh test output logs

Generate sequential output log directories for
demo.sh just like for ete.sh.

Change-Id: I67f8d5f6c9f38625c0024ad5a8d54349a52046db
Issue-ID: INT-586
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>
diff --git a/kubernetes/robot/demo-k8s.sh b/kubernetes/robot/demo-k8s.sh
index 79d545b..971c0c4 100755
--- a/kubernetes/robot/demo-k8s.sh
+++ b/kubernetes/robot/demo-k8s.sh
@@ -174,7 +174,15 @@
 
 set -x
 
-ETEHOME=/var/opt/OpenECOMP_ETE
-VARIABLEFILES="-V /share/config/vm_properties.py -V /share/config/integration_robot_properties.py -V /share/config/integration_preload_parameters.py"
 POD=$(kubectl --namespace $NAMESPACE get pods | sed 's/ .*//'| grep robot)
-kubectl --namespace $NAMESPACE exec ${POD} -- ${ETEHOME}/runTags.sh ${VARIABLEFILES} ${VARIABLES} -d /share/logs/demo/${TAG} -i ${TAG} --display 89 2> ${TAG}.out
+
+ETEHOME=/var/opt/OpenECOMP_ETE
+
+export GLOBAL_BUILD_NUMBER=$(kubectl --namespace $NAMESPACE exec  ${POD}  -- bash -c "ls -1q /share/logs/ | wc -l")
+OUTPUT_FOLDER=$(printf %04d $GLOBAL_BUILD_NUMBER)_demo_$key
+DISPLAY_NUM=$(($GLOBAL_BUILD_NUMBER + 90))
+
+VARIABLEFILES="-V /share/config/vm_properties.py -V /share/config/integration_robot_properties.py -V /share/config/integration_preload_parameters.py"
+
+kubectl --namespace $NAMESPACE exec ${POD} -- ${ETEHOME}/runTags.sh ${VARIABLEFILES} ${VARIABLES} -d /share/logs/${OUTPUT_FOLDER} -i ${TAG} --display $DISPLAY_NUM 2> ${TAG}.out
+