adding error handler

components/mobile-plugins/windows-plugin/org.wso2.carbon.device.mgt.mobile.windows.api/src/main/webapp/WEB-INF/cxf-servlet.xml

@@ -193,5 +193,6 @@
     <bean id="jsonProvider" class="org.wso2.carbon.device.mgt.mobile.windows.api.common.util.GsonMessageBodyHandler"/>
     <bean id="configurationMgtService"
           class="org.wso2.carbon.device.mgt.mobile.windows.api.services.impl.ConfigurationMgtServiceImpl"/>
+    <bean id="errorHandler" class="org.wso2.carbon.device.mgt.mobile.windows.api.common.util.ErrorHandler"/>
 </beans>