fcl-db: tests:
- add prefix "FPDEV_" for all objects, which are used in tests
- enclose TestValue in single quotes, when used in INSERT
- add statement terminator after directive COMMIT
- use Commit instead of CommitDDL when droping table

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26143 3ad0048d-3df7-0310-abae-a5850022a9f2