Change the KVStoreEngine::DBMap to be just a set of database names.
Move the code from the removed classes into KVCatalog.
- is related to
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SERVER-43352 restartCatalog expects listDatabases to include empty databases
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 - Closed
 
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- related to
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SERVER-50028 Coverity analysis defect 114771: Dereference after null check
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 - Closed
 
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