fcl-db: sqldb: TSQLTransaction.EndTransaction should end transaction (a do not leave it active). So caCommitRetaining and caRollbackRetaining are only aliases of caCommit, caRollback in this case. Bug #26068

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27738 3ad0048d-3df7-0310-abae-a5850022a9f2