added temporary fix for json-simple

pom.xml

@@ -260,6 +260,12 @@
 			<artifactId>datatables-export-itext</artifactId>
 			<version>${dandelion.version}</version>
 		</dependency>
+		<!-- temporary fix: below dependency should not be necessary as it is a transitive dependency. 
+		For some reason we can't build the app unless it is a first level dependency -->
+		<dependency>
+	         <groupId>com.googlecode.json-simple</groupId>
+	         <artifactId>json-simple</artifactId>
+	     </dependency>
 	</dependencies>
 
 	<!-- Maven plugin versions are mentioned in order to guarantee the build reproducibility in the long term -->