Floors module: accept null floors in the json

[patmmccann]

Type of issue

Feature request

Description

Currently the floors json expects a numeric value for each combination of dimensions. Publishers should be able to set null, meaning getFloor will not return any numeric value, for certain combinations of dimensions, eg video media type and some ad unit code.

[bretg]

The expected behavior of a NULL floor is that imp.bidfloor isn't sent at all for that scenario.