SONAR suggestion - log exceptions, don't print stack traces

Change-Id: I4814a0662912706df005972d44c48a7db39ecd50
diff --git a/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfActiveComponent.java b/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfActiveComponent.java
index 92043d5..33b52a4 100644
--- a/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfActiveComponent.java
+++ b/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfActiveComponent.java
@@ -194,7 +194,7 @@
             return netconfTranslator.editDeviceConfig(
                     deviceId, builder.build(), operationType);
         } catch (IOException e) {
-            e.printStackTrace();
+            log.debug("parseAndEdit()", e);
             return false;
         }
     }
diff --git a/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfTranslatorImpl.java b/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfTranslatorImpl.java
index c563204..f663fd0 100644
--- a/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfTranslatorImpl.java
+++ b/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/NetconfTranslatorImpl.java
@@ -93,8 +93,8 @@
 @Component(immediate = true)
 public class NetconfTranslatorImpl implements NetconfTranslator {
 
-    private final Logger log = LoggerFactory
-            .getLogger(getClass());
+    private static final Logger log = LoggerFactory
+            .getLogger(NetconfTranslator.class);
 
     private NodeId localNodeId;
 
@@ -354,7 +354,7 @@
             try {
                 rIdBldr = rid.copyBuilder();
             } catch (CloneNotSupportedException e) {
-                e.printStackTrace();
+                log.debug("clone not supported", e);
             }
         } else {
             rIdBldr.addBranchPointSchema("/", null);
diff --git a/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/Utils.java b/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/Utils.java
index cb8e89c..5e06420 100644
--- a/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/Utils.java
+++ b/apps/netconf/client/src/main/java/org/onosproject/netconf/client/impl/Utils.java
@@ -108,7 +108,7 @@
         try {
             transformer = transformerFactory.newTransformer();
         } catch (TransformerConfigurationException e) {
-            e.printStackTrace();
+            return "";
         }
 
         // Need to omit the xml header and set indent to 4
@@ -122,7 +122,7 @@
             try {
                 transformer.transform(xmlInput, xmlOutput);
             } catch (TransformerException e) {
-                e.printStackTrace();
+                return "";
             }
         }
         return xmlOutput.getWriter().toString();