mgr/balancer: check for end_weekday is exclusive, stops balancing too early
According to the docs
end_weekday restricts automatic balancing to this day of the week or earlier, where 0 is Sunday, 1 is Monday, and so on.
ceph config set mgr mgr/balancer/begin_weekday 1 and
ceph config set mgr mgr/balancer/end_weekday 3 should result in balancing being started on Monday and running up to including Wednesday.
Currently, the balancer checks for begin_weekday <= weekday < end_weekday which results in no balancing on Wednesday.