Skipping reconnect when not in cluster anymore.

This changeset skips the reconnect phase when the to be
reconnected node is not part of the cluster anymore. This
information is based on the locator.

Change-Id: I949ec1e78fd6b5fa73851d5461cbf3a70de11027
Reviewed-on: http://review.couchbase.org/24232
Reviewed-by: Matt Ingenthron <matt@couchbase.com>
Tested-by: Michael Nitschinger <michael.nitschinger@couchbase.com>