KvSimpleMap:Narrow Container

Build 3316 on fix-cit-kv-simple-map-improvements
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Baseline History
Build 33161f085c4
Current build. There are unaccepted changes, so build 3297 is still the baseline.
Build 3297e11e2e6 current baseline
Accepted by Matt Stover.
Build 3295c531353
Accepted by Matt Stover.
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