Commits on Jan 20, 2021

1. roachtest/tpcc: reduce load during rebalance period …

   Relates to cockroachdb#58298.
   
   One thing I've noticed when looking into cockroachdb#58298 is that we were often
   badly overloading the cluster during the rebalance wait period. During
   this time, we just want to apply a small amount of load to help instruct
   load-based splitting and rebalancing. But in some cases, we were
   completely overloading the cluster. We also weren't ramping up the load,
   as we had intended to.
   
   This commit fixes both of these issues. It adds a ramp period for the
   first quarter of the rebalance time and it scales the txn rate based on
   the expected max warehouse count instead of the loaded warehouse count.

   

   nvanbenschoten committed Jan 20, 2021
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