Automated g4 rollback of changelist 80766223.

*** Reason for rollback ***

Should not be needed after CL/81108337

*** Original change description ***

Changing the slice time to be below the query iterator timeout (can be as low as 60 seconds).

Otherwise long job/mappers currently keep failing.

***

R=irwin
DELTA=5 (0 added, 4 deleted, 1 changed)

Revision created by MOE tool push_codebase.
MOE_MIGRATION=7185