SPY-110: Update KetamaNodeLocator allNodes on reconfigure.

This changeset updates the KetamaNodeLocator to also change the
allNodes on reconfigure, not only the ketamaNodes. This fixes
an issue where broadcast operations (which rely on the allNodes
collection) were sent to the wrong targets.

Change-Id: I1184ab8f3c564d181d832cad37e63ede2dabc631
Reviewed-on: http://review.couchbase.org/24180
Reviewed-by: Michael Nitschinger <michael.nitschinger@couchbase.com>
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>