txcouchbase: Invoke ready_w() on connection loss
txcouchbase: Invoke ready_w() on connection loss

Change-Id: I198343787de6d34b6d5caa3f048633f69100f64e
Reviewed-on: http://review.couchbase.org/32927
Reviewed-by: Volker Mische <fb414f8ac0dbbf87663550ae4ef5fc95b1041941@gmail.com>
Tested-by: Mark Nunberg <e7d42768707bf23038325b0b68d4b577e5f6064a@haskalah.org>

couchbase/couchbase-python-client,mnunberg/couchbase-python-client,couchbase/couchbase-python-client,mnunberg/couchbase-python-client