Adding a very simple output for pingall

Change-Id: I7575d4f6d1c45cdfaeb6a10d1bdc8371bcb25a29
(cherry picked from commit 134c3c051f1d8bdbaee66c4ffee7579e53ffc1f0)
diff --git a/src/main/java/org/onosproject/t3/api/StaticPacketTrace.java b/src/main/java/org/onosproject/t3/api/StaticPacketTrace.java
index 542dcfd..149cba7 100644
--- a/src/main/java/org/onosproject/t3/api/StaticPacketTrace.java
+++ b/src/main/java/org/onosproject/t3/api/StaticPacketTrace.java
@@ -43,6 +43,7 @@
     private Map<DeviceId, List<FlowEntry>> flowsForDevice;
     private StringBuilder resultMessage;
     private Pair<Host, Host> hosts;
+    private boolean success = false;
 
     /**
      * Builds the trace with a given packet and a connect point.
@@ -195,6 +196,23 @@
         hosts = endpointHosts;
     }
 
+    /**
+     * Return if this trace is successful.
+     * @return true if successful
+     */
+    public boolean isSuccess() {
+        return success;
+    }
+
+    /**
+     * Sets if this trace is successful.
+     * @param success true if trace is successful.
+     */
+    public void setSuccess(boolean success) {
+        this.success = success;
+    }
+
+
     @Override
     public String toString() {
         return "StaticPacketTrace{" +