fcl-db: sqldb:
- handle quoted table names when retrieving server index informations for quoted TableName
- reset updated flag of ServerIndexDefs when SQL.Text changes
- new tests unit for sqlDB
- tested for FB, MSSQL, MySQL, PostgreSQL, Sqlite, odbc_MSSQL, odbc_PostgreSQL, odbc_Firebird, odbc_MySQL

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@24880 3ad0048d-3df7-0310-abae-a5850022a9f2