Do not duplicate error, reported in request context

Change-Id: Iabc40ee73dce82c547114bad9db397a7ea7536b8
Reviewed-on: http://review.couchbase.org/29918
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>
CCBC-169 refactor HTTP layer to allow restart requests

Change-Id: Ia358ae5593552ccfded4530eaf25c17f908e5bc6
Reviewed-on: http://review.couchbase.org/29919
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>
CCBC-255 Expose LCB_MAX_ERROR to allow user-defined codes

Change-Id: I335411a6f90c0b6e6215e249c6024471575b3fbe
Reviewed-on: http://review.couchbase.org/29920
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>