MB-6134: handle socket.error exception on pump_mc send()
MB-6134: handle socket.error exception on pump_mc send()

Change-Id: I3ae27a109ca7d61e3001e5d909c0948215fdc9b9
Reviewed-on: http://review.couchbase.org/19503
Reviewed-by: Bin Cui <ed18693fff32c00e22495f4877a3b901bed09041@gmail.com>
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

couchbase/couchbase-cli,membase/membase-cli,couchbaselabs/couchbase-cli,membase/membase-cli,couchbaselabs/couchbase-cli,couchbase/couchbase-cli,membase/membase-cli,couchbaselabs/couchbase-cli