Use IndexManager Election port as part of the watcherId.  This is to make watcherId uinqiue in clusterRun.

Change-Id: I0bb9e628fb3da1e9cb96c609ce8f06e86b866bde
Reviewed-on: http://review.couchbase.org/42454
Reviewed-by: John Liang <johliang00@gmail.com>
Tested-by: John Liang <johliang00@gmail.com>