Error Failed to load resource in SAPUI5 application

It is clear from your error message: VisitorData.view.js is not found so you have to check if this view actually exists and there is no permission issues on this view.

Try checking this to view list of deployed services − http://hanaservername.com:4000/ui_test/ui5_test/WebContent/resources/

You have to add below in your web.xml −

<context-param>
   <param-name>com.sap.ui5.resource.DEV_MODE</param-name>
   <param-value>true</param-value>
</context-param>