Extending a SAP Fiori App service url

Hi experts,

I would like to extend/modify the Fiori paystub app service url. Therefore I changed the metadataUrl variable in the Service.js from

if(jQuery.sap.getUriParameters().get("local")){this.metadataUrl="sap/opu/odata/sap/SRA006_SRV"
}else{this.metadataUrl="/sap/opu/odata/sap/SRA006_SRV"

to

if(jQuery.sap.getUriParameters().get("local")){this.metadataUrl="http://myserver.otherhost.com/sap/opu/odata/sap/SRA006_SRV"
}else{this.metadataUrl="http://myserver.otherhost.com/sap/opu/odata/sap/SRA006_SRV"

The changed Service.js file is successfully loaded to the browser (confirmed with browser dev tools), so the old file is not cached.

But the pdfs are still requested from

http://server.applicationRunsOn.com/sap/opu/odata/sap/SRA006_SRV/PDFPayslips(12)/$value

instead of

http://myserver.otherhost.com/sap/opu/odata/sap/SRA006_SRV/PDFPayslips(12)/$value

Any hints, what is missing here?

Thank you!