Revert EVM state flush interval changes#1623

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enlight merged 6 commits intomasterfrom

revert-evm-state-flush-interval

Mar 13, 2020

Commits on Mar 13, 2020

Revert "Load last block header when app starts up before responding to queries (#1620)"
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Revert "Cleanup MultiWriterAppStore (#1609)"
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Revert "Refactor the way the on-chain flush interval override is applied"
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Revert "Eliminate VersionedKVStore.GetSnapshot()"
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Revert "Allow EVM state to be flushed to disk every Nth block instead of every block (#1532)"
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Wait for 5s before running truffle tests, regardless of Jenkins OS
enlight
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