Fix Sonar critical flagged bugs

Change-Id: I60e9f72a1a66f65366d7dbc5335922e75097c9f3

@@ -276,6 +276,7 @@ public class ApplicationManager
     }
 
     // Invokes the specified function, if not null.
+    @java.lang.SuppressWarnings("squid:S1217") // We really do mean to call run()
     private void invokeHook(Runnable hook, ApplicationId appId) {
         if (hook != null) {
             try {

@@ -70,9 +70,7 @@ public class OFOpticalSwitch13 extends AbstractOpenFlowSwitch implements OpenFlo
         try {
             sendHandshakeOFExperimenterPortDescRequest();
         } catch (IOException e) {
-            log.error("Failed to send handshaker message OFExperimenterPortDescRequestfor sw {}, {}",
-                     getStringId(), e.getMessage());
-            e.printStackTrace();
+            log.error("Failed to send handshaker message OFExperimenterPortDescRequestfor sw {}", e);
         }
     }
 

@@ -96,8 +96,7 @@ public class OfOpticalSwitchImplLinc13
             sendHandshakeOFExperimenterPortDescRequest();
         } catch (IOException e) {
             log.error("LINC-OE exception while sending experimenter port desc:",
-                     e.getMessage());
-            e.printStackTrace();
+                     e);
         }
     }
 

@@ -111,7 +111,7 @@ final class XmlConfigParser {
         try {
             editcfg.save(stringWriter);
         } catch (ConfigurationException e) {
-            e.printStackTrace();
+            log.error("createControllersConfig()", e);
         }
         String s = stringWriter.toString()
                 .replaceAll("<controller>",

@@ -65,6 +65,7 @@ public final class GrpcDeviceUtils {
             return MastershipRole.STANDBY;
         case UNRECOGNIZED:
             log.warn("Unrecognized MastershipRole gRPC message: {}", role);
+            return MastershipRole.NONE;
         default:
             return MastershipRole.NONE;
         }

@@ -71,6 +71,29 @@ public class RouteDistinguisher implements Comparable<RouteDistinguisher> {
     }
 
     @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (obj instanceof RouteDistinguisher) {
+
+            RouteDistinguisher that = (RouteDistinguisher) obj;
+
+            if (this.routeDistinguisher == that.routeDistinguisher) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Long.hashCode(routeDistinguisher);
+    }
+
+    @Override
     public String toString() {
         return MoreObjects.toStringHelper(getClass())
                 .add("routeDistinguisher", routeDistinguisher)

@@ -802,7 +802,7 @@ public class DefaultOvsdbClient
         operations.add(portInsert);
 
         // update the bridge table
-        Condition condition = ConditionUtil.equals("_uuid", UUID.uuid(bridgeUuid));
+        Condition condition = ConditionUtil.isEqual("_uuid", UUID.uuid(bridgeUuid));
         Mutation mutation = MutationUtil.insert("ports", UUID.uuid("Port"));
         List<Condition> conditions = new ArrayList<>(Arrays.asList(condition));
         List<Mutation> mutations = new ArrayList<>(Arrays.asList(mutation));
@@ -875,7 +875,7 @@ public class DefaultOvsdbClient
         }
 
         List<Condition> conditions = Lists.newArrayList();
-        Condition condition = ConditionUtil.equals(childColumnName, UUID.uuid(childUuid));
+        Condition condition = ConditionUtil.isEqual(childColumnName, UUID.uuid(childUuid));
         conditions.add(condition);
         Delete del = new Delete(childTableSchema, conditions);
         operations.add(del);
@@ -898,7 +898,7 @@ public class DefaultOvsdbClient
         TableSchema tableSchema = dbSchema.getTableSchema(tableName);
 
         List<Condition> conditions = Lists.newArrayList();
-        Condition condition = ConditionUtil.equals(columnName, UUID.uuid(uuid));
+        Condition condition = ConditionUtil.isEqual(columnName, UUID.uuid(uuid));
         conditions.add(condition);
 
         Update update = new Update(tableSchema, row, conditions);
@@ -944,7 +944,7 @@ public class DefaultOvsdbClient
             mutations.add(mutation);
 
             List<Condition> conditions = Lists.newArrayList();
-            Condition condition = ConditionUtil.equals("_uuid",
+            Condition condition = ConditionUtil.isEqual("_uuid",
                                                        UUID.uuid(parentUuid));
             conditions.add(condition);
 

@@ -37,7 +37,7 @@ public final class ConditionUtil {
      * @param data column value
      * @return Condition
      */
-    public static Condition equals(String columnName, Object data) {
+    public static Condition isEqual(String columnName, Object data) {
         Object value = TransValueUtil.getFormatData(data);
         return new Condition(columnName, Function.EQUALS, value);
     }

@@ -156,6 +156,7 @@ public class IGMP extends BasePacket {
      *
      * @return the serialized IGMP message
      */
+    @java.lang.SuppressWarnings("squid:S128") // suppress switch fall through warning
     @Override
     public byte[] serialize() {
         byte [] data = new byte[8915];

@@ -137,6 +137,7 @@ public final class BoundedThreadPool extends ThreadPoolExecutor {
      * Feedback policy that delays the caller's thread until the executor's work
      * queue falls below a threshold, then runs the job on the caller's thread.
      */
+    @java.lang.SuppressWarnings("squid:S1217") // We really do mean to call run()
     private static final class CallerFeedbackPolicy implements RejectedExecutionHandler {
 
         private final BlockingBoolean underLoad = new BlockingBoolean(false);

@@ -54,6 +54,7 @@ public class MessageDecoder extends ReplayingDecoder<DecoderState> {
     }
 
     @Override
+    @java.lang.SuppressWarnings("squid:S128") // suppress switch fall through warning
     protected void decode(
             ChannelHandlerContext context,
             ByteBuf buffer,