Enable old test
New MT for RESTART WITH
Move sequence cache size to config variable
Do not use a new transaction for sequence cache and do not make visible until post commit
Unnecessary change
Some notes on how it now works
merge nathanlws: Fix sequence cache population

Merge pull request #1350 from nathanlws/sql-layer/no-new-txn-sequence-cache
https://github.com/FoundationDB/sql-layer/pull/1350