Tenor

Key Tenor in Fallback Ibor Oi Def refers to the tenor of the fallback ibor rate, which normally equals the one inside Ibor Rate
It is listed seperately here for technical reasons involved in the background process of parsing the data in Fallback Ibor Oi Table during the course of the function Fallback
It can be set to any value without any effect.
Expects an object of type Step