Remove some unused imports.
Merge branch 'master' into FDBTransactionServiceDirectorySubspaceWrapper
Have the FDBTransactionService make one last attempt to catch/rethrow
any FDBExceptions which may have snuck out from other than the commit
processing.
Convert FDBNameGenerator to use TransactionState (not Transaction) for
access to session for exception handling.
Add try/catch/wrap/throw for the FDB Exceptions throughout the FDBStore
and FDBSchemaManager code.
merge tjoneslo: Fdb transaction service directory subspace wrapper

Merge pull request #1275 from tjoneslo/sql-layer/FDBTransactionServiceDirectorySubspaceWrapper
https://github.com/FoundationDB/sql-layer/pull/1275