NCBC-626: HttpRequestException in queries after rebalance out

Change-Id: I0eed00d956f231c3826a54da6a983586618d126d
Reviewed-on: http://review.couchbase.org/41327
Tested-by: Jeffry Morris <jeffrymorris@gmail.com>
Reviewed-by: Brett Lawson <brett19@gmail.com>