Pull rebind(hkey,deep) out of Cursor hierarchy, implement in GroupScan_Default.
Pull {write,delete}IndexRow up to Store interface
Implement periodicCommit for Persistit and return true if commit happened
Move guts of createIndex/alterTable to OnlineHelper and use periodicCommit.
An IT for Persistit periodic committing.
merge nathanlws: Perform online DDL in multiple transactions

Merge pull request #1058 from nathanlws/sql-layer/online-multi-txn
https://github.com/FoundationDB/sql-layer/pull/1058