Also add TimeoutError to catch list

Change-Id: Ia9df3738b63a2f9dc36d7b05b71b3ad498857e6b
Reviewed-on: http://review.couchbase.org/32925
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>