Revert "Use Jackson XML package for JSON result generation."

This reverts commit 9fd73abd5e5cee0f91b958e4c7e5e9be8abe16e0.
diff --git a/asterix-app/pom.xml b/asterix-app/pom.xml
index b47fec1..48c4ee5 100644
--- a/asterix-app/pom.xml
+++ b/asterix-app/pom.xml
@@ -208,22 +208,17 @@
 			<type>jar</type>
 			<scope>test</scope>
 		</dependency>
-        <dependency>
-            <groupId>net.sourceforge.cobertura</groupId>
-            <artifactId>cobertura</artifactId>
-            <version>1.9.4</version>
-        </dependency>
-        <dependency>
-            <groupId>edu.uci.ics.asterix</groupId>
-            <artifactId>asterix-test-framework</artifactId>
-            <version>0.0.5-SNAPSHOT</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-core</artifactId>
-            <version>2.2.0</version>
-        </dependency>
+                <dependency>
+                    <groupId>net.sourceforge.cobertura</groupId>
+                    <artifactId>cobertura</artifactId>
+                    <version>1.9.4</version>
+                </dependency>
+                <dependency>
+                	<groupId>edu.uci.ics.asterix</groupId>
+                	<artifactId>asterix-test-framework</artifactId>
+                	<version>0.0.5-SNAPSHOT</version>
+                	<scope>test</scope>
+                </dependency>
 	</dependencies>
 
 </project>