SlowErrors done

Timeout exceptions are now logged
Fixed error

Now code checks to make sure query logging is enabled
cleaning

removing unused code
Fixed up

Bulk of code moved into log error
merge JerettS: Send queries that were too slow to the query log

Merge pull request #1363 from JerettS/sql-layer/SlowErrors
https://github.com/FoundationDB/sql-layer/pull/1363