Flexible serial number

Extend serial number lenght so it can work
with non-xo laptops.

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Remove unnecesary controls

Remove fields controls until a clear definition of requested
fields is approved.

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Add verbosity to store errors

Make sense to be able to see whats happening when
something fails.

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>