[NO ISSUE] Refactoring / cleanup

- Use shared ObjectMapper instance where possible for servlets
- Add StringUtil with camel-case conversion utility
- Serialize properties in alphabetical order when using JSONUtil

Change-Id: Idd1b805dfa425dcd87d83e361297a0351c56cc6a
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2033
Sonar-Qube: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Contrib: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Integration-Tests: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Murtadha Hubail <mhubail@apache.org>
diff --git a/hyracks-fullstack/hyracks/hyracks-http/pom.xml b/hyracks-fullstack/hyracks/hyracks-http/pom.xml
index 09bf513..7d0ddb2 100644
--- a/hyracks-fullstack/hyracks/hyracks-http/pom.xml
+++ b/hyracks-fullstack/hyracks/hyracks-http/pom.xml
@@ -71,5 +71,9 @@
       <artifactId>hyracks-util</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-databind</artifactId>
+    </dependency>
   </dependencies>
 </project>
\ No newline at end of file