[ONOS-5935] Bump up Jackson from 2.7.3 to 2.8.6

Change-Id: I995fb7d8f4dc99bbf2ba53d7a2ef3ec1c8942429
diff --git a/tools/package/maven-plugin/pom.xml b/tools/package/maven-plugin/pom.xml
index 8c770cf..2d36c86 100644
--- a/tools/package/maven-plugin/pom.xml
+++ b/tools/package/maven-plugin/pom.xml
@@ -79,12 +79,12 @@
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.7.3</version>
+            <version>2.8.6</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-annotations</artifactId>
-            <version>2.7.3</version>
+            <version>2.8.6</version>
         </dependency>
         <dependency>
             <groupId>commons-io</groupId>