Fix: Add timestamp information for openstack telemetry

Change-Id: I4ea0df183b0e11fc67a3d03c835e2863770c7795
diff --git a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/impl/StatsFlowRuleManager.java b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/impl/StatsFlowRuleManager.java
index e2f505c..54f454e 100644
--- a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/impl/StatsFlowRuleManager.java
+++ b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/impl/StatsFlowRuleManager.java
@@ -319,12 +319,13 @@
 
             // TODO: need to collect error and drop packets stats
             // TODO: need to make the refresh interval configurable
-            sBuilder.withStartupTime(0)
+            sBuilder.withStartupTime(System.currentTimeMillis())
+                    .withFstPktArrTime(System.currentTimeMillis())
+                    .withLstPktOffset(REFRESH_INTERVAL * MILLISECONDS)
                     .withCurrAccPkts((int) entry.packets())
                     .withCurrAccBytes(entry.bytes())
                     .withErrorPkts((short) 0)
-                    .withDropPkts((short) 0)
-                    .withLstPktOffset(REFRESH_INTERVAL * MILLISECONDS);
+                    .withDropPkts((short) 0);
 
             fBuilder.withStatsInfo(sBuilder.build());