the same batch many times
This allows DO to:
a) know that some logs were dropped (by trying with token and not
getting anything)
b) know how many logs were there in each batch (useful especially
for the dropped ones)
c) retry batch retrieval if it failed
Test: will be CTS tested once APIs unhidden
Bug: 29748723
(cherry picked from commit a9ff206af2)
Change-Id: Iac10e61cdf3b100719a9c029ff897bd5ef5c8e2f
bbf352a2c1