bc_http: Initialize timers with 0 timeout

Change-Id: Id529d08af4a5bd3efa0d6309dd462d61b32c26b5
Reviewed-on: http://review.couchbase.org/35167
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Brett Lawson <brett19@gmail.com>