named does not take into account the catalog zones' member
zones count when calculating the sizes of the zone mem/task pools.
Create a function in catz.c to calculate the member zones in all catalog
zones in the collection, and use that in
named when counting the
number of all zones.
Create a new event for
named which will be generated by catz.c after a
successful catalog zone post-update merge, which will adjust (if needed)
the sizes of zone mem/task pools based on the difference of member zones
count in the previous and current versions of the catalog zone.
Closes #3159 (closed)