Remove Direct.
Missed some test resources.
Make the PARAMETER STYLE json test not depend on Direct.
Leave some of the script library machinery in place. It wasn't entirely Direct-specific. But there is no lifecycle management, invoking named entry points in the library, left now.

There are presently no test scripts; they were used to test direct. But the test isn't really direct-specific, so ignore test for now.
NB: This is a different sense of "script."
merge MMcM: Remove Direct.

Merge pull request #1475 from MMcM/sql-layer/remove-direct
https://github.com/FoundationDB/sql-layer/pull/1475