Fix reverse engineering quoted table names on PostgreSQL

Commit https://github.com/doctrine/dbal/commit/83fe296de44ef3e2f04f2342021f656a797787ec introduced a bug with reverse engineering table details for tables with names requiring quotation (reserved keyword, non-identifier characters, case-folded) on PostgreSQL.
`PostgreSqlPlatform::getListTablesSQL()` fetches table names quoted if necessary with `quote_ident(tablename)` which in turn causes other `getListTable*SQL($table)` to fail retrieving results if the table name is quoted. Those methods always have to use unquoted table names in their statements.

See https://github.com/ZF-Commons/ZfcUserDoctrineORM/issues/77 for more details.