CCBC-853: cbc-proxy: do not use client object after free
CCBC-853: cbc-proxy: do not use client object after free

Change-Id: I0e3cf89903ae0ede24c315ca95e723fb372c2d7b
Reviewed-on: http://review.couchbase.org/84210
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>

couchbase/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,kojiromike/libcouchbase,kojiromike/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,kojiromike/libcouchbase,avsej/libcouchbase,kojiromike/libcouchbase