Ignore errors failing to remove files from test teadrown
Ignore errors failing to remove files from test teadrown

Our commit validation fails every now and then on windows
due to failures to remove the temporary files.

Change-Id: I1a91a49a2bf86943753de76fbe9fb951ce8cbe0e
Reviewed-on: http://review.couchbase.org/72402
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

daverigby/memcached,daverigby/memcached,daverigby/kv_engine,daverigby/memcached,daverigby/kv_engine,couchbase/memcached,couchbase/memcached,couchbase/memcached,daverigby/kv_engine,daverigby/kv_engine,daverigby/memcached,couchbase/memcached