Upgrade jackson for

restclient/pom.xml

@@ -25,7 +25,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.version>1.7</java.version>
-        <jackson.version>2.1.4</jackson.version>
+        <jackson.version>2.8.11</jackson.version>
         <httpcomponent.version>4.5.2</httpcomponent.version>
     </properties>
     <dependencies>
@@ -150,4 +150,4 @@
             </resource>  
         </resources>
     </build>
-</project>
\ No newline at end of file
+</project>