Each build is now over 40mb logs.
A lot of DEBUG logging was left on for test failures that have been
fixed. Added an issue # for ones that are still valid or if if it on
as the test verifies debug
* When leaving/downing the last node in a DC it would not
be removed in another DC, since that was only done by the
leader in the owning DC (and that is gone).
* It should be ok to eagerly remove such nodes also by
leaders in other DCs.
* Note that gossip is already sent out so for the last node
that will be spread to other DC, unless there is a network
partition. For that we can't do anything. It will be replaced
if joining again.
