Boaz Leskes d21df2a17a
Use Sequence number powered OCC for processing updates ()
Updates perform realtime get, perform the requested update and then index the document again
using optimistic concurrency control. This PR changes the logic to use sequence numbers instead
of versioning. 

Note that the current versioning logic isn't suffering from the same problem as external OCC
requests because the get and indexing is always done on the same primary.

Relates  
Relates 
2019-01-11 06:23:55 -08:00
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