[Falcon] fixes for Sonar Critical bugs

Change-Id: I0a63578727693a2517f3002bd4f4c391b6f44aea
diff --git a/apps/test/messaging-perf/src/main/java/org/onosproject/messagingperf/MessagingPerfApp.java b/apps/test/messaging-perf/src/main/java/org/onosproject/messagingperf/MessagingPerfApp.java
index 8b41bd5..a0bc7d5 100644
--- a/apps/test/messaging-perf/src/main/java/org/onosproject/messagingperf/MessagingPerfApp.java
+++ b/apps/test/messaging-perf/src/main/java/org/onosproject/messagingperf/MessagingPerfApp.java
@@ -310,7 +310,7 @@
                 messageSendingExecutor.submit(this::requestReply);
             });
         } catch (Exception e) {
-            e.printStackTrace();
+            log.info("requestReply()", e);
         }
     }
 
@@ -323,7 +323,7 @@
                     encoder,
                     randomPeer());
         } catch (Exception e) {
-            e.printStackTrace();
+            log.info("unicast()", e);
         }
         messageSendingExecutor.submit(this::unicast);
     }
@@ -336,7 +336,7 @@
                     TEST_UNICAST_MESSAGE_TOPIC,
                     encoder);
         } catch (Exception e) {
-            e.printStackTrace();
+            log.info("broadcast()", e);
         }
         messageSendingExecutor.submit(this::broadcast);
     }