http.c: in case when connection unsuccessful, cancel request
http.c: in case when connection unsuccessful, cancel request

Change-Id: Ifcf168cc7bd8496a99407ca1d9f5357e36553d7e
Reviewed-on: http://review.couchbase.org/23528
Reviewed-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Tested-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>

dewolfe/couchbase-ruby-client,dewolfe/couchbase-ruby-client