VarGate.set issue with parent / child

[jperezov]

Currently, VarGate logs a warning message when a child module sets a variable that has already been set in its parent without specifying that the override is intentional using VarGate.override.

Suppose we have

var childGate = VarGate.register('child');
childGate.set('first', 1);
VarGate.set('first', 2);

This will not cause a warning message to be logged, and is code that is prone to causing hard-to-debug logic errors. Not really sure how to tackle this at the moment, but it is a known issue.