Currently, the provision throttling feature only supports
enabling/disabling the feature globally.  In order to move
forward with the feature, we need to be able to enable it
on selected devservers only (see  bug 760652 ).

The feature is a devserver feature, and the devserver has no
configuration file, let alone puppet support for selective
distinctions of this sort.  The most likely mechanism for this
is to add a command-line option to the devserver, and then
include or exclude the option through the upstart job, which
is delivered via puppet.