Upgrade fasterXML libraries for OS-9

Upgrade fasterXML to version 2.9.5 to address security vulnerability
Wrap calls to treeRead(InputStream) to handle new behavior of null streams

Change-Id: Id199cfacd0cf9e5371dc33de9f1e058c2e72eaa5
diff --git a/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/PortPairWebResource.java b/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/PortPairWebResource.java
index 96cf9ac..2c88f6f 100644
--- a/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/PortPairWebResource.java
+++ b/apps/vtn/vtnweb/src/main/java/org/onosproject/vtnweb/resources/PortPairWebResource.java
@@ -18,6 +18,7 @@
 
 import static javax.ws.rs.core.Response.Status.OK;
 import static org.onlab.util.Tools.nullIsNotFound;
+import static org.onlab.util.Tools.readTreeFromStream;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -105,7 +106,7 @@
     @Produces(MediaType.APPLICATION_JSON)
     public Response createPortPair(InputStream stream) {
         try {
-            ObjectNode jsonTree = (ObjectNode) mapper().readTree(stream);
+            ObjectNode jsonTree = readTreeFromStream(mapper(), stream);
             JsonNode port = jsonTree.get("port_pair");
             PortPair portPair = codec(PortPair.class).decode((ObjectNode) port, this);
             Boolean isSuccess = nullIsNotFound(get(PortPairService.class).createPortPair(portPair),
@@ -131,7 +132,7 @@
     public Response updatePortPair(@PathParam("pair_id") String id,
                                    final InputStream stream) {
         try {
-            ObjectNode jsonTree = (ObjectNode) mapper().readTree(stream);
+            ObjectNode jsonTree = readTreeFromStream(mapper(), stream);
             JsonNode port = jsonTree.get("port_pair");
             PortPair portPair = codec(PortPair.class).decode((ObjectNode) port, this);
             Boolean isSuccess = nullIsNotFound(get(PortPairService.class).updatePortPair(portPair),