Added log4j dependency

samples/contacts/pom.xml

@@ -76,6 +76,11 @@
             <artifactId>hessian</artifactId>
             <version>3.0.1</version>
         </dependency>
+        <dependency>
+            <groupId>log4j</groupId>
+            <artifactId>log4j</artifactId>
+            <scope>runtime</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -100,4 +105,4 @@
         </plugins>
     </build>
 
-</project>
+</project>