upgraded jackson to 2.8.1

Author: Chandra Addala

pom.xml

@@ -54,6 +54,7 @@
     <skip.unit.tests>false</skip.unit.tests>
     <slf4j.version>1.7.6</slf4j.version>
     <elasticsearch.version>2.4.1</elasticsearch.version>
+    <jackson.version>2.8.1</jackson.version>
     <lucene.version>5.5.2</lucene.version>
     <jodatime.version>2.9</jodatime.version>
     <maven.build.timestamp.format>yyyyMMdd-HHmmss</maven.build.timestamp.format>
@@ -109,17 +110,17 @@
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-annotations</artifactId>
-        <version>2.6.2</version>
+        <version>${jackson.version}</version>
       </dependency>
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-core</artifactId>
-        <version>2.6.2</version>
+        <version>${jackson.version}</version>
       </dependency>
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-databind</artifactId>
-        <version>2.6.2</version>
+        <version>${jackson.version}</version>
       </dependency>
     </dependencies>
   </dependencyManagement>