ACCUMULO-2057 track lastLocation through a split
Revert "ACCUMULO-2057 track lastLocation through a split"

checked in changes for other tickets... need to redo

This reverts commit 9cae04863ae46bcd47b09ec883d39dc676574a53.
ACCUMULO-2057 track lastLocation through a split
ACCUMULO-1889 found a few more ZooKeeperInstances that are not closed
ACCUMUL-2056 work around HostAndPort not being serializable
ACCUMUL-2054 error when a namespace does not exist