No cleanup for alter
No cleanup for createIndexes
Remove treeRemovalIsDelayed from interface
Unreferenced variable
Remove method in test
merge nathanlws: No tree existence measures

Merge pull request #1010 from nathanlws/sql-layer/no-persistit-tree-existence-measures
https://github.com/FoundationDB/sql-layer/pull/1010
Parameterize store and its storage description.