AthViews and ViewAlgs: Get scheduler on the fly, not in initialize
Online the scheduler cannot be initialised before forking. Since the View creators need a handle to the scheduler, they have to retrieve it on the fly in execute
because during their initialize
the scheduler is not allowed to exist. This fixes ATR-20012.
I'm sure this is slower (although didn't test how much), but I don't see a better solution right now.
Edited by Rafal Bielski