control:utils: Modifier `less_than` default value

Support an optional `default_value` to be provided on `less_than`
modifiers where that value, if given, is used as the value returned when
no entry is found instead of returning the default for the data type of
the parameter value.

Change-Id: Ide067a06896ac73ff3a0df6f646d8eca57b097fe
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
1 file changed