[Falcon] fixes for Sonar Critical bugs

Change-Id: I0a63578727693a2517f3002bd4f4c391b6f44aea
diff --git a/drivers/src/main/java/org/onosproject/driver/handshaker/CalientFiberSwitchHandshaker.java b/drivers/src/main/java/org/onosproject/driver/handshaker/CalientFiberSwitchHandshaker.java
index 2f591d3..493ac2f 100644
--- a/drivers/src/main/java/org/onosproject/driver/handshaker/CalientFiberSwitchHandshaker.java
+++ b/drivers/src/main/java/org/onosproject/driver/handshaker/CalientFiberSwitchHandshaker.java
@@ -87,8 +87,7 @@
         try {
             sendHandshakeOFExperimenterPortDescRequest();
         } catch (IOException e) {
-            log.error("Exception while sending experimenter port desc:", e.getMessage());
-            e.printStackTrace();
+            log.error("Exception while sending experimenter port desc:", e);
         }
 
     }