Grunt build fails when we provide languages param.

[muthuselvan86]

Subject of the issue/enhancement/features

grunt build fails when we run with param --languages=en

Your environment

• Framework. 5.6.1
• Tested on Mac OS

Steps to reproduce

Build the course using grunt build --languages=en

Expected behaviour

Should build the course with English language package.

Actual behaviour

It breaks at grunt (schema-defaults) step where it look for course/config.json that isn't copied into build folder yet. I compared it with older version of the framework 4.2 this isn't a problem there.

Screenshots (if you can)

[oliverfoster]

This was my fault, apologies. I was unaware of the languages flag when I rewrote this code.