ep-engine to:  50cc6180d66150ab0450793438d2518c92a03cbb   MB-9953 Correct a rev_seqno type to uint64_t

Change-Id: Ia26d0813435439364c915a38be92706b4c95f7d5
Reviewed-on: http://review.couchbase.org/32783
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>