The authentication.oauth.clientid must match the one in services.js

The client_id is present twice in services.js and in application.yml. It needs to be the same value everywhere. I've hardcoded `jhipsterapp` everywhere.

The other solution would be to use `<%= baseName %>app` everywhere. However, if there's a space in the baseName, we also need to escape it in the url contained in the var data.