LMS

Implements the same logic to call js function in Java as it has been done is javascript:

Implement the following methods :

- JavascriptFunction.call(Object scope, Object... param);
- JavascriptFunction.call(Object scope);
- JavascriptFunction.call();
- JavascriptFunction.apply(Object scope, Object[] params);
- JavascriptFunction.apply(Object scope);
- JavascriptFunction.apply();

Moreover it would be better to not include automatically the scope in the JavascriptFunction and let the developer put it when he calls the function.