Application config is not available in main.js

[aro]

The app.config object, when accessed in the application main.js script, does not contain the configuration options from the app .cfg file.

It works when the same is done from a JavaScript controller.

To reproduce it, create a main.js in the application with this code:

log.info('App:\r\n' + JSON.stringify(app, null, 4));

Create a configuration file for the app: $XP_HOME/config/com.enonic.myappname.cfg

param1=value1
param2=value2

Build and deploy.
The config is printed out in the log but without the configuration properties.

{
    "name": "com.enonic.myappname",
    "version": "6.15.3",
    "config": {}
}

Reported in Discuss: https://discuss.enonic.com/t/app-config-not-loaded-upon-executing-main-es6/1668/4