fcl-db: tests: add more field types to FieldDataSet

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25372 3ad0048d-3df7-0310-abae-a5850022a9f2
fcl-db: base: add support for ftGuid field type in XMLDatapacketReader (type='string', subtype='Guid' like in Delphi)

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@25373 3ad0048d-3df7-0310-abae-a5850022a9f2