[mattbostock] Set password timeout delay to zero
[mattbostock] Set password timeout delay to zero

The OSX module used by boxen defaults to a 5 second delay between the
time you lock your screen and the time OSX will start prompting for a
password.

Set the delay to zero, so that as soon as I have locked my screen, OSX
will prompt for a password.

alphagov/gds-boxen,alphagov/gds-boxen,alphagov/gds-boxen