sqldb/tests improvements:
* fix memory leak in gui runner
sqldb/tests for dbf/tdbf/dbase/foxpro unit:
* added dbf specific tests
* specify desired tablelevel by connectorparams=<tablelevel> (e.g. 4 for DBase IV)
* dbftoolsunit set up similar to bufdataset tools unit including autocleaning files
- dbname= field in database.ini no longer used for dbf files; always write to temp directory
To do: go through other tests and add ignores if necessary for non-relevant tests



git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24104 3ad0048d-3df7-0310-abae-a5850022a9f2