This is the first step in the removal of uptime columns on the
nodes table. These columns are no longer used:
uptime_success_count
total_uptime_count
uptime_reputation_alpha
uptime_reputation_beta
In order to avoid breaking backwards compatibility, we need to
remove all references to these columns before removing the columns
themselves from the database. However, since uptime_success_count
and total_uptime_count are NOT NULLABLE, we can't remove them from
the insert statements in the overlay. So we can't remove the columns
because of the references, and we can't remove the references because
the columns can't be null. What a pickle. To remedy this, we will set a
default on the columns. Then we should be able to remove them from the
insert statements
Change-Id: I75f6c56fb7897835bbf29869f86f39de1d9dd345
