Bump up fasterxml jackson lib to 2.7.0 and clean up dependencies

Change-Id: I43d672a1f275ef7108b5dd416f3f120485823d0f
diff --git a/utils/stc/pom.xml b/utils/stc/pom.xml
index 5590b39..6d6170f 100644
--- a/utils/stc/pom.xml
+++ b/utils/stc/pom.xml
@@ -55,13 +55,13 @@
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.4.2</version>
+            <version>2.7.0</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-annotations</artifactId>
-            <version>2.4.2</version>
+            <version>2.7.0</version>
             <scope>compile</scope>
         </dependency>