[bz4788267] Child errors are not communicated clearly to parents

[add0n]

The default error() function the composite plugin uses to handle child errors looks like this:

        error: function(err) {
            Y.log("Error executing child mojit at '" + this.id + "':", 'error', NAME);
            Y.log(err.message, 'error', NAME);
            Y.log(err.stack, 'error', NAME);
            // Pass back some empty data so we don't fail the composite
            this.done('');
        }

In order to allow the parent mojit to continue running, it passes back an empty string into ac.done(), but we should have a way to communicate child errors

[caridy]

This is still an issue. Let's bump this up. /cc @rwaldura @jenny

[caridy]

will be available in [email protected] scheduled for next week.